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Nguyen-Hoang L, Papastefanou I, Sahota DS, Pooh RK, Zheng M, Chaiyasit N, Tokunaka M, Shaw SW, Seshadri S, Choolani M, Yapan P, Sim WS, Poon LC. Evaluation of screening performance of first-trimester competing-risks prediction model for small-for-gestational age in Asian population. Ultrasound Obstet Gynecol 2024; 63:331-341. [PMID: 37552550 DOI: 10.1002/uog.27447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 06/17/2023] [Accepted: 07/21/2023] [Indexed: 08/10/2023]
Abstract
OBJECTIVE To examine the external validity of the Fetal Medicine Foundation (FMF) competing-risks model for the prediction of small-for-gestational age (SGA) at 11-14 weeks' gestation in an Asian population. METHODS This was a secondary analysis of a multicenter prospective cohort study in 10 120 women with a singleton pregnancy undergoing routine assessment at 11-14 weeks' gestation. We applied the FMF competing-risks model for the first-trimester prediction of SGA, combining maternal characteristics and medical history with measurements of mean arterial pressure (MAP), uterine artery pulsatility index (UtA-PI) and serum placental growth factor (PlGF) concentration. We calculated risks for different cut-offs of birth-weight percentile (< 10th , < 5th or < 3rd percentile) and gestational age at delivery (< 37 weeks (preterm SGA) or SGA at any gestational age). Predictive performance was examined in terms of discrimination and calibration. RESULTS The predictive performance of the competing-risks model for SGA was similar to that reported in the original FMF study. Specifically, the combination of maternal factors with MAP, UtA-PI and PlGF yielded the best performance for the prediction of preterm SGA with birth weight < 10th percentile (SGA < 10th ) and preterm SGA with birth weight < 5th percentile (SGA < 5th ), with areas under the receiver-operating-characteristics curve (AUCs) of 0.765 (95% CI, 0.720-0.809) and 0.789 (95% CI, 0.736-0.841), respectively. Combining maternal factors with MAP and PlGF yielded the best model for predicting preterm SGA with birth weight < 3rd percentile (SGA < 3rd ) (AUC, 0.797 (95% CI, 0.744-0.850)). After excluding cases with pre-eclampsia, the combination of maternal factors with MAP, UtA-PI and PlGF yielded the best performance for the prediction of preterm SGA < 10th and preterm SGA < 5th , with AUCs of 0.743 (95% CI, 0.691-0.795) and 0.762 (95% CI, 0.700-0.824), respectively. However, the best model for predicting preterm SGA < 3rd without pre-eclampsia was the combination of maternal factors and PlGF (AUC, 0.786 (95% CI, 0.723-0.849)). The FMF competing-risks model including maternal factors, MAP, UtA-PI and PlGF achieved detection rates of 42.2%, 47.3% and 48.1%, at a fixed false-positive rate of 10%, for the prediction of preterm SGA < 10th , preterm SGA < 5th and preterm SGA < 3rd , respectively. The calibration of the model was satisfactory. CONCLUSION The screening performance of the FMF first-trimester competing-risks model for SGA in a large, independent cohort of Asian women is comparable with that reported in the original FMF study in a mixed European population. © 2023 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- L Nguyen-Hoang
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - I Papastefanou
- Fetal Medicine Research Institute, King's College Hospital, London, UK
- Department of Women and Children's Health, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - D S Sahota
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - R K Pooh
- CRIFM Prenatal Medical Clinic, Osaka, Japan
| | - M Zheng
- Center for Obstetrics and Gynecology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - N Chaiyasit
- Department of Obstetrics and Gynecology, King Chulalongkorn Memorial Hospital, Bangkok, Thailand
| | - M Tokunaka
- Department of Obstetrics and Gynecology, Showa University Hospital, Tokyo, Japan
| | - S W Shaw
- Department of Obstetrics and Gynecology, Taipei Chang Gung Memorial Hospital, Taipei, Taiwan
| | | | - M Choolani
- Department of Obstetrics and Gynecology, National University Hospital, Singapore
| | - P Yapan
- Faculty of Medicine, Siriraj Hospital, Bangkok, Thailand
| | - W S Sim
- Maternal-Fetal Medicine, KK Women's and Children's Hospital, Singapore
| | - L C Poon
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
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Wong NKL, Wah IYM, Wong STK, Nguyen-Hoang L, Lau CSL, Ip PNP, Leung HHY, Sahota DS, Poon LC. A point-of-care urine test to predict adverse maternal and neonatal outcomes in Asian women with suspected preeclampsia. Arch Gynecol Obstet 2023:10.1007/s00404-023-07257-5. [PMID: 37882870 DOI: 10.1007/s00404-023-07257-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 10/05/2023] [Indexed: 10/27/2023]
Abstract
OBJECTIVES To assess clinical utility of the urine Congo red dot test (CRDT) in predicting composite adverse maternal and neonatal outcomes in women with suspected preeclampsia (PE). METHODS CRDT result and pregnancy outcomes were prospectively documented in women with new onset or pre-existing hypertension, new or pre-existing proteinuria, PE symptoms and suspected PE-related fetal growth restriction or abnormal Doppler presenting from 20 weeks' gestation between January 2020 and December 2022. Participants and clinicians were blinded to the CRDT result and managed according to internally agreed protocols. Composite maternal outcome was defined as PE, postpartum hemorrhage, intensive care unit admission, and maternal death. Composite neonatal outcome was defined as small for gestational age, preterm birth, 5-min Apgar score < 7, neonatal intensive care unit admission, and neonatal death. RESULTS Two hundred and forty-four women out of two hundred and fifty-one (97.2%) had a negative CRDT. All seven women with positive CRDT had both adverse maternal and neonatal outcomes, giving positive predictive values (PPV) of 100%. Rates of composite adverse maternal and neonatal outcomes in CDRT negative women were 103/244 [42.2%, 95% confidence interval (CI) 36.2%-48.5%] and 170/244 (69.7%, 95% CI 63.6%-75.1%), respectively. CRDT negative predictive values (NPV) for adverse maternal and neonatal outcomes were, respectively, 141/244 (57.8%, 95% CI 48.6%-68.2%) and 74/244 (30.3%, 95% CI 23.8%-38.1%). CONCLUSION CRDT had low NPV but high PPV for adverse maternal and neonatal outcomes in women with suspected PE. Its role in clinical management and triage of women with suspected PE is limited as it cannot identify those at low risk of developing adverse outcomes.
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Affiliation(s)
- Natalie K L Wong
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Prince of Wales Hospital, 1/F Special Block E, Shatin, Hong Kong, China
| | - Isabella Y M Wah
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Prince of Wales Hospital, 1/F Special Block E, Shatin, Hong Kong, China
| | - Sani T K Wong
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Prince of Wales Hospital, 1/F Special Block E, Shatin, Hong Kong, China
| | - Long Nguyen-Hoang
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Prince of Wales Hospital, 1/F Special Block E, Shatin, Hong Kong, China
| | - Caitlyn S L Lau
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Prince of Wales Hospital, 1/F Special Block E, Shatin, Hong Kong, China
| | - Patricia N P Ip
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Prince of Wales Hospital, 1/F Special Block E, Shatin, Hong Kong, China
| | - Hillary H Y Leung
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Prince of Wales Hospital, 1/F Special Block E, Shatin, Hong Kong, China
| | - Daljit S Sahota
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Prince of Wales Hospital, 1/F Special Block E, Shatin, Hong Kong, China.
| | - Liona C Poon
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Prince of Wales Hospital, 1/F Special Block E, Shatin, Hong Kong, China.
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Moungmaithong S, Wang X, Lau CSL, Tse AWT, Lee NMW, Leung HHY, Poon LC, Sahota DS. Glycosylated fibronectin improves first-trimester prediction of pre-eclampsia. Ultrasound Obstet Gynecol 2023; 62:512-521. [PMID: 37616523 DOI: 10.1002/uog.27451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/23/2023] [Accepted: 07/24/2023] [Indexed: 08/26/2023]
Abstract
OBJECTIVE To determine whether maternal serum glycosylated fibronectin (GlyFn) level in the first trimester increases the sensitivity of the Fetal Medicine Foundation (FMF) triple test, which incorporates mean arterial pressure, uterine artery pulsatility index and placental growth factor, when screening for pre-eclampsia (PE) in an Asian population. METHODS This was a nested case-control study of Chinese women with a singleton pregnancy who were screened for PE at 11-13 weeks' gestation as part of a non-intervention study between December 2016 and June 2018. GlyFn levels were measured retrospectively in archived serum from 1685 pregnancies, including 101 with PE, using an enzyme-linked immunosorbent assay (ELISA), and from 448 pregnancies, including 101 with PE, using a point-of-care (POC) device. Concordance between ELISA and POC tests was assessed using Lin's correlation coefficient and Passing-Bablok and Bland-Altman analyses. GlyFn was transformed into multiples of the median (MoM) to adjust for maternal and pregnancy characteristics. GlyFn MoM was compared between PE and non-PE pregnancies, and the association between GlyFn MoM and gestational age at delivery with PE was assessed. Risk for developing PE was estimated using the FMF competing-risks model. Screening performance for preterm and any-onset PE using different biomarker combinations was quantified by area under the receiver-operating-characteristics curve (AUC) and detection rate (DR) at a 10% fixed false-positive rate (FPR). Differences in AUC between biomarker combinations were compared using the DeLong test. RESULTS The concordance correlation coefficient between ELISA and POC measurements was 0.86 (95% CI, 0.83-0.88). Passing-Bablok analysis indicated proportional bias (slope, 1.08 (95% CI, 1.04-1.14)), with POC GlyFn being significantly higher compared with ELISA GlyFn. ELISA GlyFn in non-PE pregnancies was independent of gestational age at screening (P = 0.11), but significantly dependent on maternal age (P < 0.003), weight (P < 0.0002), height (P = 0.001), parity (P < 0.02) and smoking status (P = 0.002). Compared with non-PE pregnancies, median GlyFn MoM using ELISA and POC testing was elevated significantly in those with preterm PE (1.23 vs 1.00; P < 0.0001 and 1.18 vs 1.00; P < 0.0001, respectively) and those with term PE (1.26 vs 1.00; P < 0.0001 and 1.22 vs 1.00; P < 0.0001, respectively). GlyFn MoM was not correlated with gestational age at delivery with PE (P = 0.989). Adding GlyFn to the FMF triple test for preterm PE increased significantly the AUC from 0.859 to 0.896 (P = 0.012) and increased the DR at 10% FPR from 64.9% (95% CI, 48.7-81.1%) to 82.9% (95% CI, 66.4-93.4%). The corresponding DRs at 10% FPR for any-onset PE were 52.5% (95% CI, 42.3-62.5%) and 65.4% (95% CI, 55.2-74.5%), respectively. CONCLUSIONS Adding GlyFn to the FMF triple test increased the screening sensitivity for both preterm and any-onset PE in an Asian population. Prospective non-intervention studies are needed to confirm these initial findings. © 2023 The Authors. Ultrasound in Obstetrics & Gynecology published by John Wiley & Sons Ltd on behalf of International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- S Moungmaithong
- Department of Obstetrics and Gynaecology, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - X Wang
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - C S L Lau
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - A W T Tse
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, Hong Kong, SAR, China
| | - N M W Lee
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - H H Y Leung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - L C Poon
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, SAR, China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - D S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong, SAR, China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong, SAR, China
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Moungmaithong S, Kwan AH, Tse AW, Wong NK, Lam MS, Wang J, Poon LC, Sahota DS. Evaluation of first trimester maternal serum inhibin-A for preeclampsia screening. PLoS One 2023; 18:e0288289. [PMID: 37428792 DOI: 10.1371/journal.pone.0288289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 06/24/2023] [Indexed: 07/12/2023] Open
Abstract
BACKGROUND International professional organizations recommend aspirin prophylaxis to women screened high risk for preterm preeclampsia (PE) in the first trimester. The UK Fetal Medicine Foundation (FMF) screening test for preterm PE using mean arterial pressure (MAP), uterine artery pulsatility index (UTPI) and placental growth factor (PlGF) was demonstrated to have lower detection rate (DR) in Asian population studies. Additional biomarkers are therefore needed in Asian women to improve screening DRs as a significant proportion of women with preterm and term PE are currently not identified. OBJECTIVES To evaluate maternal serum inhibin-A at 11-13 weeks as an alternative to PlGF or as an additional biomarker within the FMF screening test for preterm PE. STUDY DESIGN This is a nested case-control study using pregnancies initially screened at 11-13 weeks for preterm PE using the FMF triple test in a non-intervention study conducted between December 2016 and June 2018. Inhibin-A levels were retrospectively measured in 1,792 singleton pregnancies, 112 (1.7%) with PE matched for time of initial screening with 1,680 unaffected pregnancies. Inhibin-A levels were transformed to multiple of the expected median (MoM). The distribution of log10 inhibin-A MoM in PE and unaffected pregnancies and the association between log10 inhibin-A MoM and gestational age (GA) at delivery in PE were assessed. The screening performance determined by area under receiver operating characteristic curves (AUC) and detection rates (DRs) at a 10% fixed false positive rate (FPR), for preterm and term PE was determined. All risks for preterm and term PE were based on the FMF competing risk model and Bayes theorem. Differences in AUC (ΔAUC) between different biomarker combinations were compared using the Delong test. McNemar's test was used to assess the off-diagonal change in screening performance at a fixed 10% FPR after adding inhibin-A or replacing PlGF in the preterm PE adjusted risk estimation model. RESULTS Inhibin-A levels in unaffected pregnancies were significantly dependent on GA, maternal age and weight and were lower in parous women with no previous history of PE. Mean log10 inhibin-A MoM in any-onset PE (p<0.001), preterm (p<0.001) and term PE (p = 0.015) pregnancies were all significantly higher than that of unaffected pregnancies. Log10 inhibin-A MoM was inversely but not significantly correlated (p = 0.165) with GA at delivery in PE pregnancies. Replacing PlGF with inhibin-A in the FMF triple test reduced AUC and DR from 0.859 and 64.86% to 0.837 and 54.05%, the ΔAUC was not statistically significant. AUC and DR when adding inhibin-A to the FMF triple test were 0.814, 54.05% and the -0.045 reduction in AUC was statistically significant (p = 0.001). At a fixed 10% FPR, replacing PlGF with inhibin-A identified 1 (2.7%) additional pregnancy but missed 5 (13.5%) pregnancies which subsequently developed preterm PE identified by the FMF triple test. Adding inhibin-A missed 4 (10.8%) pregnancies and did not identify any additional pregnancies with preterm PE. CONCLUSION Replacing PlGF by inhibin-A or adding inhibin-A as an additional biomarker in and to the FMF triple screening test for preterm PE does not improve screening performance and will fail to identify pregnancies that are currently identified by the FMF triple test.
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Affiliation(s)
- Sakita Moungmaithong
- Department of Obstetrics and Gynaecology, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Angel H Kwan
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Ada W Tse
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Natalie K Wong
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Michelle S Lam
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Jing Wang
- Department of Obstetrics and Gynaecology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Liona C Poon
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong SAR, China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Daljit S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong SAR, China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Hong Kong SAR, China
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Guo J, Feng Q, Chaemsaithong P, Appiah K, Sahota DS, Leung BW, Chung JP, Li TC, Poon LC. Biomarkers at 6 weeks' gestation in the prediction of early miscarriage in pregnancy following assisted reproductive technology. Acta Obstet Gynecol Scand 2023. [PMID: 37377341 PMCID: PMC10378019 DOI: 10.1111/aogs.14618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 06/04/2023] [Accepted: 06/07/2023] [Indexed: 06/29/2023]
Abstract
INTRODUCTION Miscarriage is a major concern in early pregnancy among women having conceived with assisted reproductive treatments. This study aimed to examine potential miscarriage-related biophysical and biochemical markers at 6 weeks' gestation among women with confirmed clinical pregnancy following in vitro fertilization (IVF)/embryo transfer (ET) and evaluate the performance of a model combining maternal factors, biophysical and biochemical markers at 6 weeks' gestation in the prediction of first trimester miscarriage among singleton pregnancies following IVF/ET. MATERIAL AND METHODS A prospective cohort study was conducted in a teaching hospital between December 2017 and January 2020 including women who conceived through IVF/ET. Maternal mean arterial pressure, ultrasound markers including mean gestational sac diameter, fetal heart activity, crown rump length and mean uterine artery pulsatility index (mUTPI) and biochemical biomarkers including maternal serum soluble fms-like tyrosine kinase-1 (sFlt-1), placental growth factor (PlGF), kisspeptin and glycodelin-A were measured at 6 weeks' gestation. Logistic regression analysis was carried out to determine significant predictors of miscarriage prior to 13 weeks' gestation and performance of screening was estimated by receiver-operating characteristics curve analysis. RESULTS Among 169 included pregnancies, 145 (85.8%) pregnancies progressed to beyond 13 weeks' gestation and had live births whereas 24 (14.2%) pregnancies resulted in a miscarriage during the first trimester. In the miscarriage group, compared to the live birth group, maternal age, body mass index, and mean arterial pressure were significantly increased; mean gestational sac diameter, crown rump length, mUTPI, serum sFlt-1, glycodelin-A, and the rate of positive fetal heart activity were significantly decreased, while no significant differences were detected in PlGF and kisspeptin. Significant prediction for miscarriage before 13 weeks' gestation was provided by maternal age, fetal heart activity, mUTPI, and serum glycodelin-A. The combination of maternal age, ultrasound (fetal heart activity and mUTPI), and biochemical (glycodelin-A) markers achieved the highest area under the curve (AUC: 0.918, 95% CI 0.866-0.955), with estimated detection rates of 54.2% and 70.8% for miscarriage before 13 weeks' gestation, at fixed false positive rates of 5% and 10%, respectively. CONCLUSIONS A combination of maternal age, fetal heart activity, mUTPI, and serum glycodelin-A at 6 weeks' gestation could effectively identify IVF/ET pregnancies at risk of first trimester miscarriage.
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Affiliation(s)
- Jun Guo
- Department of Obstetrics and Gynaecology, Beijing Tongren Hospital, The Capital Medical University, Beijing, China
| | - Qiaoli Feng
- Department of Obstetrics and Gynaecology, Peking University Shenzhen Hospital, Shenzhen, China
| | - Piya Chaemsaithong
- Department of Obstetrics and Gynecology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Kubi Appiah
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Daljit S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Bo Wah Leung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Jacqueline P Chung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Tin Chiu Li
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Liona C Poon
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
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Wong STK, Sahota DS, Wong NKL, Wah IYM, Wang X, Lau SL, Chiu CPH, Ip PNP, Poon LC. A point-of care urine test to predict preeclampsia development in Asian women with suspected preeclampsia. Pregnancy Hypertens 2023; 32:28-34. [PMID: 37003112 DOI: 10.1016/j.preghy.2023.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 02/09/2023] [Accepted: 03/21/2023] [Indexed: 04/03/2023]
Abstract
OBJECTIVES To evaluate the diagnostic performance and clinical utility of the urine Congo red dot test (CRDT) in predicting preeclampsia (PE) within 7 days, 14 days and 28 days of assessment. STUDY DESIGN A prospective single center double blind non-intervention study conducted from January 2020 to March 2022. Urine congophilia has been proposed as a point-of-care test for the prediction and rapid identification of PE. In our study, urine CRDT and pregnancy outcomes were assessed in women presenting with clinical features of suspected PE after 20 weeks of gestation. RESULTS Among the 216 women analyzed, 78 (36.1 %) women developed PE, in which only 7 (9.0 %) of them had a positive urine CRDT test. The median (IQR) interval between the initial test and the diagnosis of PE was significantly shorter for women with a positive urine CRDT compared with women with a negative urine CRDT (1 day (0-5 days) vs 8 days (1-19 days), P = 0.027). The negative predictive value of a negative urine CRDT test for PE within 7 days, 14 days and 28 days of assessment were 83.73 % (95 %CI 81.75 %- 85.54 %), 78.92 % (95 % confidence interval [CI] 77.07 %- 80.71 %) and 71.77 % (95 %CI 70.06 %- 73.42 %) respectively. The sensitivity of the urine CRDT in ruling in PE within 7 days, 14 days and 28 days of assessment were 17.07 % (95 %CI 7.15 %- 32.06 %), 13.73 % (95 %CI 5.70 %- 26.26 %) and 10.61 % (95 %CI 4.37 %- 20.64 %), respectively. CONCLUSIONS Urine CRDT alone has high specificity yet low sensitivity in the short-term prediction of PE in women with suspected PE. Further studies are required to evaluate its clinical utility.
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Affiliation(s)
- Sani T K Wong
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - Daljit S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong.
| | - Natalie K L Wong
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - Isabella Y M Wah
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - Xueqin Wang
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - S L Lau
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - C P H Chiu
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - Patricia N P Ip
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - Liona C Poon
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong.
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Fung GPG, Lau SL, Hui ASY, Wong STK, Tse WT, Ng PC, Sahota DS, Lam HS, Leung TY. Neonatal mortality in singleton pregnancies: a 20-year retrospective study from a tertiary perinatal unit in Hong Kong. Hong Kong Med J 2022; 28:430-437. [PMID: 36442841 DOI: 10.12809/hkmj2210357] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
INTRODUCTION The global neonatal death (NND) rate has been declining in recent decades, but there are no comprehensive data concerning the characteristics of NNDs in Hong Kong. This study investigated the trends and aetiologies of NNDs among singleton pregnancies in Hong Kong. METHODS This study included all cases of NND from singleton pregnancies in a tertiary hospital in Hong Kong between 2000 and 2019. The rates, clinical characteristics, and aetiologies of NND were compared between the first (2000-2009) and the second (2010-2019) decades. RESULTS The NND rate decreased from 1.66/1000 livebirths (97 cases) in the first decade to 1.32/1000 livebirths (87 cases) in the second decade. Congenital or genetic abnormalities (82 cases) caused 44.6% of all NNDs. There was a significant reduction from 0.82/1000 livebirths in the first decade to 0.52/1000 livebirths in the second decade (P=0.037). Other causes of NND were prematurity (69 cases; 37.5%), sepsis (16 cases; 8.7%), hypoxic-ischaemic encephalopathy (15 cases; 8.2%), and sudden infant death syndrome (2 cases; 1.1%). Gestational age-specific neonatal mortality for moderately preterm neonates (31-33 weeks of gestation) significantly decreased from 34.73/1000 in 2000-2009 to 8.63/1000 in 2010-2019 (P=0.001), but there were no significant changes in neonatal mortality for other gestations. CONCLUSION The NND rate in Hong Kong is among the lowest worldwide. Neonatal deaths in our centre declined over the past two decades, mainly because of improvements in the prenatal diagnosis and treatment of congenital or genetic abnormalities, as well as an improved survival rate among moderately preterm neonates.
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Affiliation(s)
- G P G Fung
- Department of Paediatrics, The Chinese University of Hong Kong, Hong Kong
| | - S L Lau
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - A S Y Hui
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - S T K Wong
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - W T Tse
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - P C Ng
- Department of Paediatrics, The Chinese University of Hong Kong, Hong Kong
| | - D S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - H S Lam
- Department of Paediatrics, The Chinese University of Hong Kong, Hong Kong
| | - T Y Leung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
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Lau SL, Wong STK, Tse WT, Fung GPG, Lam HS, Sahota DS, Leung TY. Perinatal mortality rate in multiple pregnancies: a 20-year retrospective study from a tertiary obstetric unit in Hong Kong. Hong Kong Med J 2022; 28:347-355. [PMID: 36059150 DOI: 10.12809/hkmj2210153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023] Open
Abstract
INTRODUCTION Multiple pregnancies have become more common, but their perinatal mortality rate remains higher than the rate among singleton pregnancies. This retrospective study investigated the prevalence and causes of perinatal mortality among multiple pregnancies in Hong Kong. METHODS All multiple pregnancies in a university tertiary obstetric unit between 2000 and 2019 were reviewed, and the medical records of cases complicated by stillbirth and neonatal death were identified. The causes of perinatal mortality were determined based on clinical assessment and laboratory results, then compared between the first (2000-2009) and second (2010-2019) decades. RESULTS The prevalence of multiple pregnancies increased from 1.41% in the first decade to 1.91% in the second decade (P<0.001). Compared with the first decade, the second decade had a lower stillbirth rate (14.72 vs 7.68 [both per 1000 births]; P=0.026), late neonatal death rate (4.78 vs 1.16 [both per 1000 livebirths]; P=0.030), and total mortality rate (25.32 vs 13.82 [both per 1000 births]; P=0.006). The decline in stillbirth rate was related to improvements in antenatal care and treatment. The decline in the late neonatal death rate was related to a reduction in preterm birth before 34 weeks (18.5% vs 15.2%; P=0.006), as well as an improvement in the mortality rate in the subgroup of 31-33 weeks (19.23 vs 0 [both per 1000 livebirths]; P=0.035). CONCLUSION Although the prevalence of multiple pregnancies increased during the study period, the corresponding total perinatal mortality rate improved by 45.4%.
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Affiliation(s)
- S L Lau
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - S T K Wong
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - W T Tse
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - G P G Fung
- Department of Paediatrics, The Chinese University of Hong Kong, Hong Kong
| | - H S Lam
- Department of Paediatrics, The Chinese University of Hong Kong, Hong Kong
| | - D S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - T Y Leung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
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Chiu CPH, Feng Q, Chaemsaithong P, Sahota DS, Lau YY, Yeung YK, Yim LW, Chung JPW, Poon LC. Prediction of spontaneous preterm birth and preterm prelabor rupture of membranes using maternal factors, obstetric history and biomarkers of placental function at 11-13 weeks. Ultrasound Obstet Gynecol 2022; 60:192-199. [PMID: 35445767 DOI: 10.1002/uog.24917] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 03/25/2022] [Accepted: 04/07/2022] [Indexed: 06/14/2023]
Abstract
OBJECTIVES To determine whether first-trimester biomarkers of placental function can be used to screen for spontaneous preterm birth (sPTB), and to develop prediction models using maternal factors, obstetric history and biomarkers of placental function at 11-13 weeks for the calculation of patient-specific risk for sPTB. METHODS This was a retrospective secondary analysis of data derived from a prospective cohort study on first-trimester screening for pre-eclampsia in singleton pregnancies attending for routine Down syndrome screening at 11 + 0 to 13 + 6 weeks' gestation at a tertiary obstetric unit between December 2016 and September 2019. A split-sample internal validation method was used to explore and develop prediction models for all sPTB at < 37 weeks and for PTB at < 37 weeks after preterm prelabor rupture of membranes (PPROM) using maternal risk factors, uterine artery Doppler indices, serum placental growth factor (PlGF), pregnancy-associated plasma protein-A (PAPP-A) and β-human chorionic gonadotropin (β-hCG). Screening performance was assessed using receiver-operating-characteristics (ROC)-curve analysis, with calculation of the areas under the ROC curves (AUCs). RESULTS A total of 9298 singleton pregnancies were included in this study. sPTB at < 37 weeks occurred in 362 (3.89%) cases, including 231 (2.48%) cases of PPROM. sPTB at < 34 weeks occurred in 87 (0.94%) cases, including 39 (0.42%) cases of PPROM. Identified maternal risk factors for sPTB at < 37 weeks included chronic hypertension, conception using in-vitro fertilization and history of PTB. Maternal risk factors for PPROM at < 37 weeks included conception using in-vitro fertilization and history of PTB. Median PlGF multiples of the median (MoM) and PAPP-A MoM were significantly reduced in women with sPTB at < 37 weeks, as well as in those who had PPROM, compared to those who delivered at term. Screening by a combination of maternal risk factors, PAPP-A and PlGF achieved better performance in predicting sPTB at < 37 weeks (AUC, 0.630 vs 0.555; detection rate (DR), 24.8% vs 16.6% at a false-positive rate (FPR) of 10%; P ≤ 0.0001) and PPROM at < 37 weeks (AUC, 0.643 vs 0.558; DR, 28.1% vs 17.0% at a FPR of 10%; P ≤ 0.0001) than using maternal risk factors alone. Both models were successfully applied to the internal validation dataset, with AUCs of 0.628 and 0.650, respectively. CONCLUSIONS We demonstrated that low levels of maternal serum PAPP-A and PlGF in the first trimester are associated with increased risks of sPTB and PPROM at < 37 weeks. However, further research is needed to identify additional biomarkers to improve the screening performance of the combined model that includes maternal risk factors, PAPP-A and PlGF before clinical application. © 2022 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- C P H Chiu
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - Q Feng
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - P Chaemsaithong
- Department of Obstetrics and Gynecology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - D S Sahota
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - Y Y Lau
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - Y K Yeung
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - L W Yim
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - J P W Chung
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, SAR, China
| | - L C Poon
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Hong Kong, SAR, China
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10
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Wah YMI, Sahota DS, Chaemsaithong P, Wong L, Kwan AHW, Ting YH, Law KM, Leung TY, Poon LC. Impact of replacing or adding pregnancy-associated plasma protein-A at 11-13 weeks on screening for preterm pre-eclampsia. Ultrasound Obstet Gynecol 2022; 60:200-206. [PMID: 35468236 DOI: 10.1002/uog.24918] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 03/31/2022] [Accepted: 04/12/2022] [Indexed: 06/14/2023]
Abstract
OBJECTIVE To assess whether pregnancy-associated plasma protein-A (PAPP-A) alters or provides equivalent screening performance as placental growth factor (PlGF) when screening for preterm pre-eclampsia (PE) at 11-13 weeks of gestation. METHODS This was a secondary analysis of a non-intervention screening study of 6546 singleton pregnancies that were screened prospectively for preterm PE in the first trimester between December 2016 and June 2018. Patient-specific risks for preterm PE were estimated by maternal history, mean arterial pressure (MAP), uterine artery pulsatility index (UtA-PI), PlGF and PAPP-A. A competing-risks model with biomarkers expressed as multiples of the median was used. All women and clinicians were blinded to the risk for preterm PE. The performance of screening for preterm PE using PlGF vs PAPP-A vs both PAPP-A and PlGF was assessed by comparing areas under the receiver-operating-characteristics (AUC) curves. McNemar's test was used to compare detection rate at a fixed false-positive rate (FPR) of 10%. RESULTS PlGF and PAPP-A were measured in 6546 women, of whom 37 developed preterm PE. The AUC and detection rate at 10% FPR using PlGF in combination with maternal history, MAP and UtA-PI were 0.854 and 59.46%, respectively. The respective values were 0.813 and 51.35% when replacing PlGF with PAPP-A and 0.855 and 59.46% when using both PAPP-A and PlGF. Statistically non-significant differences were noted in AUC when replacing PlGF with PAPP-A (ΔAUC, 0.04; P = 0.095) and when using both PAPP-A and PlGF (ΔAUC, 0.002; P = 0.423). However, on an individual case basis, screening using PlGF in conjunction with maternal history, MAP and UtA-PI identified three (8.1%) additional pregnancies that developed preterm PE and that were not identified when replacing PlGF with PAPP-A. Screening using PAPP-A in addition to maternal history and other biomarkers did not identify any additional pregnancies. CONCLUSION On an individual case basis, adoption of a screening strategy that uses PAPP-A instead of PlGF results in reduced detection of preterm PE, consistent with previous literature. © 2022 International Society of Ultrasound in Obstetrics and Gynecology.
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Affiliation(s)
- Y M I Wah
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, SAR, China
| | - D S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, SAR, China
| | - P Chaemsaithong
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, SAR, China
| | - L Wong
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, SAR, China
| | - A H W Kwan
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, SAR, China
| | - Y H Ting
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, SAR, China
| | - K M Law
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, SAR, China
| | - T Y Leung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, SAR, China
| | - L C Poon
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, SAR, China
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11
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Fung LWY, Cheung ECW, Wong ASW, Sahota DS, Lao TTH. Patient acceptance of transvaginal sonographic endometrial thickness assessment compared with hysteroscopy and biopsy for exclusion of endometrial cancer in cases of postmenopausal bleeding. Hong Kong Med J 2022; 28:133-139. [PMID: 35410963 DOI: 10.12809/hkmj208792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
INTRODUCTION Available examinations for women with postmenopausal bleeding include transvaginal sonography to measure endometrial thickness (TVS-ET), and invasive endometrial assessment using hysteroscopy/endometrial biopsy. However, selection of the examination method seldom involves consideration of patient preferences. The aim of this study was to examine patient preferences for the method used to investigate postmenopausal bleeding. METHODS Women were asked to complete an interviewer-administered structured survey before they underwent clinical investigations at a university gynaecology unit from June 2016 to June 2017. Using the standard gamble approach, women were asked to choose between invasive assessment by hysteroscopy/endometrial biopsy (gold standard) or TVS-ET with a risk of missing endometrial cancer. The risk of missing endometrial cancer during TVS-ET was varied until each woman was indifferent to either option. RESULTS The median detection rate for endometrial cancer required using TVS-ET was 95% (interquartile range=80%-99.9%). In total, 200 women completed the survey, and 77 (38.5%) women required TVS-ET to have a 99.9% detection rate for endometrial cancer. Prior hysteroscopy experience was the only factor that influenced the women's decisions: a significantly higher detection rate was required by this patient group than by patients without previous hysteroscopy experience (P=0.047). CONCLUSION A substantial proportion of women would accept TVS-ET alone for the investigation of postmenopausal bleeding. In the era of patientcentred care, clinicians should incorporate patient preferences and enable women to make informed choices concerning the management of postmenopausal bleeding.
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Affiliation(s)
- L W Y Fung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - E C W Cheung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - A S W Wong
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - D S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - T T H Lao
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
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12
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Leung TY, Cheng YKY, Sahota DS, Yu SCH. Perioperative prophylactic internal iliac artery balloon occlusion for prevention of postpartum haemorrhage in placenta praevia: a randomised controlled trial (abridged secondary publication). Hong Kong Med J 2022; 28 Suppl 1:23-26. [PMID: 35260512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023] Open
Affiliation(s)
- T Y Leung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital
| | - Y K Y Cheng
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital
| | - D S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital
| | - S C H Yu
- Department of Imaging and Interventional Radiology, The Chinese University of Hong Kong, Prince of Wales Hospital
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13
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Leung HHY, Kwok CYT, Sahota DS, Leung MBW, Lui GCY, Ng SSS, Leung WC, Chan PKS, Poon LCY. Effects of strict public health measures on seroprevalence of anti-SARS-CoV-2 antibodies during pregnancy. Hong Kong Med J 2022; 28:294-299. [PMID: 35086966 DOI: 10.12809/hkmj219653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
INTRODUCTION A substantial number of people infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) remain asymptomatic throughout the course of infection. Nearly half of pregnant women with coronavirus disease 2019 (COVID-19) are asymptomatic upon diagnosis; these cases are not without risk of maternal morbidity. Here, we investigated the seroprevalence of anti-SARS-CoV-2 antibodies in an unselected sample of pregnant women in Hong Kong. METHODS This prospective cohort study included pregnant women who presented for routine Down syndrome screening (DSS) between November 2019 and October 2020; all women subsequently delivered at the booking hospitals. Serum antibodies against SARS-CoV-2 were analysed using a qualitative serological assay in paired serum samples taken at DSS and delivery for all participants. RESULTS In total, 1830 women were recruited. Six women (0.33%) were seropositive at the DSS visit; this seropositivity persisted until delivery. Of the six women, none reported relevant symptoms during pregnancy; one reported a travel history before DSS and one reported relevant contact history. The interval between sample collections was 177 days (range, 161-195). Among women with epidemiological risk factors, 1.79% with travel history, 50% with relevant contact history, and 0.77% with community SARS-CoV-2 testing history, were seropositive. CONCLUSION The low seroprevalence in this study suggests that strict public health measures are effective for preventing SARS-CoV-2 transmission. However, these measures cannot be maintained indefinitely. Until a highly effective therapeutic drug targeting SARS-CoV-2 becomes available, vaccination remains the best method to control the COVID-19 pandemic.
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Affiliation(s)
- H H Y Leung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - C Y T Kwok
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - D S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - M B W Leung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - G C Y Lui
- Division of Infectious Diseases, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong
| | - S S S Ng
- Division of Respiratory Diseases, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong
| | - W C Leung
- Department of Obstetrics and Gynaecology, Kwong Wah Hospital, Hong Kong
| | - P K S Chan
- Division of Infectious Diseases, Department of Medicine and Therapeutics, The Chinese University of Hong Kong, Hong Kong
| | - L C Y Poon
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
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14
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Wong STK, Tse WT, Lau SL, Sahota DS, Leung TY. Stillbirth rate in singleton pregnancies: a 20-year retrospective study from a public obstetric unit in Hong Kong. Hong Kong Med J 2022; 28:285-293. [DOI: 10.12809/hkmj219361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Affiliation(s)
- Sani TK Wong
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - WT Tse
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - SL Lau
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - Daljit S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
| | - TY Leung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Hong Kong
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15
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Lao TT, Wong LL, Hui SYA, Sahota DS. Iron Deficiency Anaemia and Atonic Postpartum Haemorrhage Following Labour. Reprod Sci 2022; 29:1102-1110. [PMID: 34993930 DOI: 10.1007/s43032-021-00534-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 03/03/2021] [Indexed: 11/24/2022]
Abstract
The purpose of this retrospective cohort study is to determine if iron deficiency anaemia (IDA) is associated with increased atonic postpartum haemorrhage (PPH) following labour. Women with singleton pregnancy carried to 24 or more weeks gestation, who were delivered under our care from 1997 to 2019, constituted the study population. A diagnosis of IDA was based on the finding of haemoglobin <10 g/dL and serum ferritin <15 μg/L in the absence of haemoglobinopathies. Women with elective caesarean section were excluded. Maternal characteristics, use of oxytocin, labour outcome and occurrence of PPH were compared between women with and without a diagnosis of IDA. The 1032 women (0.86%) with IDA exhibited slightly but significantly different maternal characteristics and had significantly higher incidence of total (4.5% versus 3.2%, p = 0.024) and atonic PPH (3.1% versus 2.0%, p = 0.011) despite similar incidences of labour induction, augmentation, and instrumental and intrapartum caesarean delivery. Multivariate analysis with adjustment for the effects of age, body mass index, height, parity, abortion history, labour induction and augmentation, instrumental delivery and infant macrosomia demonstrated that IDA was independently associated with total PPH (adjusted relative risk, aRR: 1.455, 95% confidence ratio, CI: 1.040-2.034) and atonic PPH (aRR: 1.588, 95% CI: 1.067-2.364). Our results indicate that despite the low prevalence in our population, IDA was independently associated with atonic PPH, probably consequent to placental adaptive changes in the presence of IDA. The correction and prevention of IDA could be the most important measure in countering the rising global prevalence of atonic PPH.
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Affiliation(s)
- Terence T Lao
- Department of Obstetrics & Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, 1/F, Block E, Shatin, Hong Kong, People's Republic of China.
| | - Lulu L Wong
- Department of Obstetrics & Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, 1/F, Block E, Shatin, Hong Kong, People's Republic of China
| | - Shuk Yi Annie Hui
- Department of Obstetrics & Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, 1/F, Block E, Shatin, Hong Kong, People's Republic of China
| | - Daljit S Sahota
- Department of Obstetrics & Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, 1/F, Block E, Shatin, Hong Kong, People's Republic of China
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Chaiyasit N, Sahota DS, Ma R, Choolani M, Wataganara T, Sim WS, Chaemsaithong P, Wah YMI, Hui SYA, Poon LC. Prospective Evaluation of International Prediction of Pregnancy Complications Collaborative Network Models for Prediction of Preeclampsia: Role of Serum sFlt-1 at 11-13 Weeks' Gestation. Hypertension 2021; 79:314-322. [PMID: 34689595 DOI: 10.1161/hypertensionaha.121.18021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The study aimed to investigate whether serum sFlt-1 (soluble fms-like tyrosine kinase-1) at 11-13 weeks' gestation in pregnancies that subsequently developed preeclampsia was different from those without preeclampsia and compare screening performance of the International Prediction of Pregnancy Complications (IPPIC) reported models, which include various combinations of maternal factors, systolic blood pressure, diastolic blood pressure, PlGF (placental growth factor) and sFlt-1 and the competing risk (CR) models, which include various combinations of maternal factors, mean arterial pressure (MAP) and PlGF for predicting any-onset, early-onset, and late-onset preeclampsia. This was a prospective multicenter study in 7877 singleton pregnancies. The differences of the predictive performance between the IPPIC and CR models were compared. There were 141 women (1.79%) who developed preeclampsia, including 13 cases (0.17%) of early-onset preeclampsia and 128 cases (1.62%) of late-onset preeclampsia. In pregnancies that developed preeclampsia compared to unaffected pregnancies, median serum sFlt-1 levels and its MoMs were not significantly different (p>0.05). There was no significant association between gestational age at delivery and log10 sFlt-1 and log10 sFlt-1 MoM (p>0.05). The areas under the curve of CR models were significantly higher than the IPPIC models for the prediction of any-onset and late-onset preeclampsia but not for early-onset preeclampsia. In conclusion, there are no significant differences in the maternal serum sFlt-1 levels at 11-131 weeks' gestation between women who subsequently develop preeclampsia and those who do not. Moreover, the CR models for the prediction of any-onset and late-onset preeclampsia perform better than the IPPIC reported model.
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Affiliation(s)
- Noppadol Chaiyasit
- From King Chulalongkorn Memorial Hospital, Bangkok, Thailand (Noppadol Chaiyasit)
| | - Daljit S Sahota
- The Chinese University of Hong Kong, Hong Kong SAR (D.S.S., Y.M.I.W., S.Y.A.H., L.C.P.)
| | - Runmei Ma
- First Affiliated Hospital of Kunming Medical University, Kunming, China (R.M.)
| | | | - Tuangsit Wataganara
- Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand (T.W.)
| | - Wen Shan Sim
- KK Women's and Children's Hospital, Singapore (W.S.S.)
| | - Piya Chaemsaithong
- Department of Obstetrics and Gynecology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand (P.C.)
| | - Yi Man Isabella Wah
- The Chinese University of Hong Kong, Hong Kong SAR (D.S.S., Y.M.I.W., S.Y.A.H., L.C.P.)
| | - Shuk Yi Annie Hui
- The Chinese University of Hong Kong, Hong Kong SAR (D.S.S., Y.M.I.W., S.Y.A.H., L.C.P.)
| | - Liona C Poon
- The Chinese University of Hong Kong, Hong Kong SAR (D.S.S., Y.M.I.W., S.Y.A.H., L.C.P.)
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Wong L, Tse WT, Lai CY, Hui ASY, Chaemsaithong P, Sahota DS, Poon LC, Leung TY. Bradycardia‐to‐delivery interval and fetal outcomes in umbilical cord prolapse. Acta Obstet Gynecol Scand 2020; 100:170-177. [DOI: 10.1111/aogs.13985] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2020] [Revised: 08/20/2020] [Accepted: 08/20/2020] [Indexed: 11/26/2022]
Affiliation(s)
- Lo Wong
- Department of Obstetrics and Gynecology The Chinese University of Hong Kong Hong Kong Hong Kong
| | - Wing T. Tse
- Department of Obstetrics and Gynecology The Chinese University of Hong Kong Hong Kong Hong Kong
| | - Chit Y. Lai
- Department of Obstetrics and Gynecology The Chinese University of Hong Kong Hong Kong Hong Kong
| | - Annie S. Y. Hui
- Department of Obstetrics and Gynecology The Chinese University of Hong Kong Hong Kong Hong Kong
| | - Piya Chaemsaithong
- Department of Obstetrics and Gynecology The Chinese University of Hong Kong Hong Kong Hong Kong
| | - Daljit S. Sahota
- Department of Obstetrics and Gynecology The Chinese University of Hong Kong Hong Kong Hong Kong
| | - Liona C. Poon
- Department of Obstetrics and Gynecology The Chinese University of Hong Kong Hong Kong Hong Kong
| | - Tak Y. Leung
- Department of Obstetrics and Gynecology The Chinese University of Hong Kong Hong Kong Hong Kong
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18
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Lam MSN, Chaemsaithong P, Kwan AHW, Wong STK, Tse AWT, Sahota DS, Leung TY, Poon LC. Prelabor short-term variability in fetal heart rate by computerized cardiotocogram and maternal fetal doppler indices for the prediction of labor outcomes. J Matern Fetal Neonatal Med 2020; 35:1318-1327. [PMID: 32283958 DOI: 10.1080/14767058.2020.1752657] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Objectives: To investigate (i) the association between pre-labor maternal-fetal Dopplers and fetal heart rate short-term variability (FHR STV) with arterial cord blood pH and (ii) the potential value of pre-labor maternal-fetal Dopplers, FHR STV and Dawes-Redman criteria in predicting composite neonatal morbidity at term in a cohort of unselected women.Method: A prospective study in 218 women with term singleton pregnancy in latent phase of labor or due to undergo induction of labor. Data on maternal characteristics, maternal-fetal Dopplers indices and computerized cardiotocography (CTG) findings of FHR STV and Dawes-Redman criteria were collected. Pearson correlation analysis was used to determine the relationship between maternal-fetal Dopplers and FHR STV and arterial cord blood pH. Logistic regression analysis was used to determine which factors amongst maternal characteristics, labor onset, indication of labor induction, estimated fetal weight (EFW), maternal-fetal Dopplers, FHR STV and Dawes-Redman criteria were significant predictors of composite neonatal morbidity and arterial cord blood pH less than 7.2.Result: Of the 218 cases, 12 (5.5%) women were delivered by emergency operative delivery for pathological CTG, and 42 babies (19.3%) had composite neonatal morbidities. Arterial cord blood pH was not associated with maternal-fetal Doppler indices and FHR STV, but rather it was associated with maternal age and body mass index. The composite neonatal morbidity and arterial cord blood pH less than 7.2 were not significantly associated with maternal characteristics, labor onset, indication of labor induction, pre-labor assessment of EFW, maternal-fetal Doppler indices, FHR STV and Dawes-Redman criteria by computerized CTG.Conclusion: In unselected women in latent phase of labor or undergoing induction of labor at term, admission maternal-fetal Doppler indices, FHR STV and Dawes-Redman criteria are not predictive of composite neonatal morbidity.
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Affiliation(s)
- Michelle S N Lam
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Piya Chaemsaithong
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Angel H W Kwan
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Sani T K Wong
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Ada W T Tse
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Daljit S Sahota
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Tak Yeung Leung
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - Liona C Poon
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
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Wan OYK, Chan SSC, Chung JPW, Kwok JWK, Lao TTH, Sahota DS. External validation of a simple scoring system to predict pregnancy viability in women presenting to an early pregnancy assessment clinic. Hong Kong Med J 2020; 26:102-110. [PMID: 32245913 DOI: 10.12809/hkmj198276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
INTRODUCTION A scoring system combining clinical history and simple ultrasound parameters was developed to predict early pregnancy viability beyond the first trimester. The scoring system has not yet been externally validated. This study aimed to externally validate this scoring system to predict ongoing pregnancy viability beyond the first trimester. METHODS This prospective observational cohort study enrolled women with singleton intrauterine pregnancies before 12 weeks of gestation. Women underwent examination and ultrasound scan to assess gestational sac size, yolk sac size, and fetal pulsation status. A pregnancy-specific viability score was derived in accordance with the Bottomley score. Pregnancy outcomes at 13 to 16 weeks were documented. Receiver-operating characteristic curve analysis was used to assess the discriminatory performance of the scoring system. RESULTS In total, 1508 women were enrolled; 1271 were eligible for analysis. After adjustment for covariates, miscarriage (13%) was significantly associated with age ≥35 years (odds ratio [OR]=1.99, 95% confidence interval [CI]: 1.19-3.34), higher bleeding score (OR=2.34, 95% CI: 1.25-4.38), gestational age (OR=1.17, 95% CI: 1.13-1.22), absence of yolk sac (OR=4.73, 95% CI: 2.11-10.62), absence of fetal heart pulsation (OR=3.57, 95% CI: 1.87-6.84), mean yolk sac size (OR=1.25, 95% CI: 1.06-1.47), and fetal size (OR=0.82, 95% CI: 0.77-0.88). The area under the receiver operating characteristic curve was 0.91 (95% CI: 0.89-0.93). Viability score of ≥1 corresponded to a >90% probability of viable pregnancy. CONCLUSIONS The scoring system was easy to use. A score of ≥1 could be used to counsel women who have a high likelihood of viable pregnancy beyond the first trimester.
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Affiliation(s)
- O Y K Wan
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - S S C Chan
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - J P W Chung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - J W K Kwok
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - T T H Lao
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - D S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Shatin, Hong Kong
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Leung TY, Au Yeung KC, Leung WC, Leung KY, Lo TK, To WWK, Lau WL, Chan LW, Sahota DS, Choy RKW. Prenatal diagnosis of pathogenic genomic imbalance in fetuses with increased nuchal translucency but normal karyotyping using chromosomal microarray. Hong Kong Med J 2019; 25 Suppl 5:30-32. [PMID: 31416984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023] Open
Affiliation(s)
- T Y Leung
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong
| | - K C Au Yeung
- Department of Obstetrics & Gynaecology, Tuen Mun Hospital
| | - W C Leung
- Department of Obstetrics & Gynaecology, Kwong Wah Hospital
| | - K Y Leung
- Department of Obstetrics & Gynaecology, Queen Elizabeth Hospital
| | - T K Lo
- Department of Obstetrics & Gynaecology, Princess Margaret Hospital
| | - W W K To
- Department of Obstetrics & Gynaecology, United Christian Hospital
| | - W L Lau
- Department of Obstetrics & Gynaecology, Kwong Wah Hospital
| | - L W Chan
- Department of Obstetrics & Gynaecology, United Christian Hospital
| | - D S Sahota
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong
| | - R K W Choy
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong
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21
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Poon LC, Sahota DS, Chaemsaithong P, Nakamura T, Machida M, Naruse K, Wah YM, Leung TY, Pooh RK. Transvaginal three-dimensional ultrasound assessment of Sylvian fissures at 18-30 weeks' gestation. Ultrasound Obstet Gynecol 2019; 54:190-198. [PMID: 30381851 DOI: 10.1002/uog.20172] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 10/16/2018] [Accepted: 10/19/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To (1) evaluate the normal development of the Sylvian fissures in the anterior coronal view of the fetal brain at 18-30 weeks' gestation by transvaginal three-dimensional (3D) ultrasound, (2) develop reference ranges of measurements of the right and left Sylvian fissure angles during normal pregnancy at 18-30 weeks' gestation, and (3) examine intra- and interobserver repeatability of measurements of the right and left Sylvian fissure angles. METHODS This was a prospective cross-sectional study of 422 women with a singleton pregnancy attending an ultrasound-based research clinic between March and December 2017. The entry criteria for the study were appropriately grown live fetus with no suspected structural and/or chromosomal defects between 18 + 0 and 30 + 6 weeks' gestation. Normal development of the Sylvian fissures was assessed in the anterior coronal plane of the fetal brain using transvaginal 3D volume multiplanar imaging. The coronal view was visualized as a single image from the three orthogonal views. Subsequently, the right and left Sylvian fissure angles were measured between a horizontal reference line (0°) and a line drawn along the upper side of the respective Sylvian fissure. Intra- and interobserver repeatability of the Sylvian fissure angle measurements was assessed by Bland-Altman plots. Reference equations were constructed for right and left Sylvian fissure angles for gestational age (GA) and head circumference (HC) using the Generalized Additive Models for Location Scale and Shape package. RESULTS In the anterior coronal view of the fetal brain, an inward rotation of the upper portion of the Sylvian fissures was observed during the second and third trimesters of pregnancy. There was a significant negative polynomial association between the Sylvian fissure angles and GA and HC. Both Sylvian fissure angles crossed the reference line (zero), going from positive to negative, at around 25 weeks' gestation or at HC of 22 cm. Z-score difference between the smoothed percentiles of the right and left Sylvian fissure angles indicated that median, 10th and 90th smoothed percentiles were closest and almost the same for the GA-based references between 18 and 28 weeks and for the HC-based references between 14 and 24 cm. The intraclass correlation coefficient of the right and left Sylvian fissure angle measurements between the two sonographers was excellent at 0.993 (95% CI, 0.988-0.996) and 0.991 (95% CI, 0.985-0.995), respectively. On Bland-Altman analysis, the mean difference between the two sonographers in right Sylvian fissure angle measurement was 0.4° (95% CI, -10.2 to 10.1°) and in left Sylvian fissure angle it was 1.0° (95% CI, -9.6 to 11.6°). CONCLUSIONS Assessment of the Sylvian fissure angles is highly reproducible. Sylvian fissure angle reference charts can serve as a screening tool for malformations of cortical development, guiding subsequent follow-up and referral for fetal brain magnetic resonance imaging and/or assessment by an expert neurosonologist. Copyright © 2018 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- L C Poon
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - D S Sahota
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - P Chaemsaithong
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - T Nakamura
- CRIFM Clinical Research Institute of Fetal Medicine Pooh Maternity Clinic, Osaka, Japan
| | - M Machida
- CRIFM Clinical Research Institute of Fetal Medicine Pooh Maternity Clinic, Osaka, Japan
| | - K Naruse
- St Barnabas' Hospital, Osaka, Japan
| | - Y M Wah
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - T Y Leung
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR
| | - R K Pooh
- CRIFM Clinical Research Institute of Fetal Medicine Pooh Maternity Clinic, Osaka, Japan
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Chung JPW, Law TSM, Chung CHS, Mak JSM, Sahota DS, Li TC. Impact of haemostatic sealant versus electrocoagulation on ovarian reserve after laparoscopic ovarian cystectomy of ovarian endometriomas: a randomised controlled trial. BJOG 2019; 126:1267-1275. [DOI: 10.1111/1471-0528.15807] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/18/2019] [Indexed: 12/23/2022]
Affiliation(s)
- JPW Chung
- Department of Obstetrics and Gynaecology Prince of Wales Hospital The Chinese University of Hong Kong Shatin Hong Kong, SAR
| | - TSM Law
- Department of Obstetrics and Gynaecology Prince of Wales Hospital The Chinese University of Hong Kong Shatin Hong Kong, SAR
| | - CHS Chung
- Department of Obstetrics and Gynaecology Prince of Wales Hospital The Chinese University of Hong Kong Shatin Hong Kong, SAR
| | - JSM Mak
- Department of Obstetrics and Gynaecology Prince of Wales Hospital The Chinese University of Hong Kong Shatin Hong Kong, SAR
| | - DS Sahota
- Department of Obstetrics and Gynaecology Prince of Wales Hospital The Chinese University of Hong Kong Shatin Hong Kong, SAR
| | - TC Li
- Department of Obstetrics and Gynaecology Prince of Wales Hospital The Chinese University of Hong Kong Shatin Hong Kong, SAR
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Lao TT, Hui ASY, Law LW, Sahota DS. Prior abortion history and pregnancy hypertensive disorders in primiparous gravidae. Pregnancy Hypertens 2018; 14:168-173. [PMID: 30527107 DOI: 10.1016/j.preghy.2018.10.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 09/27/2018] [Accepted: 10/11/2018] [Indexed: 12/25/2022]
Abstract
OBJECTIVES To explore the relationship between prior abortion history with incidence of pregnancy hypertensive disorders (PHD), including gestational hypertension (GH) and pre-eclampsia (PE), to determine whether the secular increases in GH and PE in developed countries could be related in part to the decreased incidence of abortion. STUDY DESIGN A single center retrospective cohort study on primiparous Chinese gravidae managed in 1997-2015 in our hospital. MAIN OUTCOME MEASURES The occurrence of PHD, GH and PE with respect to the presence or otherwise of prior abortions, with the analysis stratified for risk factors that include advanced age, high body mass index (BMI), history of medical disorders, birth before 34 weeks, and maternal hepatitis B virus (HBV) infection and rubella non-immunity which have been shown to influence the occurrence of PHD in our population. RESULTS The 23,698 (39.3%) of the 60,335 gravidae in the cohort with ≥ one prior abortion had higher incidence of advanced age, HBV infection, rubella non-immunity, and high BMI, but lower incidence of PHD, GH, PE and birth before 34 weeks gestation. The difference in the incidence of GH and PE between gravidae having one versus those with two or more abortions was minimal, and the effect of abortion on PHD was influenced by the other risk factors. On regression analysis, prior abortion reduced PHD (aRR 0.761, 95% CI 0.684-0.846), GH (aRR 0.660, 95% CI 0.563-0.773), and PE (aRR 0.857, 95% CI 0.745-0.987). CONCLUSIONS Prior abortion reduces the subsequent development of GH and PE in primiparous women.
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Affiliation(s)
- Terence T Lao
- Departments of Obstetrics & Gynaecology, The Chinese University of Hong Kong, and Prince of Wales Hospital, Shatin, Hong Kong, China.
| | - Annie S Y Hui
- Departments of Obstetrics & Gynaecology, The Chinese University of Hong Kong, and Prince of Wales Hospital, Shatin, Hong Kong, China
| | - Lai-Wa Law
- Departments of Obstetrics & Gynaecology, The Chinese University of Hong Kong, and Prince of Wales Hospital, Shatin, Hong Kong, China
| | - Daljit S Sahota
- Departments of Obstetrics & Gynaecology, The Chinese University of Hong Kong, and Prince of Wales Hospital, Shatin, Hong Kong, China
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Cheung CWC, Saravelos SH, Chan TYA, Sahota DS, Wang CC, Chung PW, Li TC. A prospective observational study on the stress levels at the time of embryo transfer and pregnancy testing following in vitro fertilisation treatment: a comparison between women with different treatment outcomes. BJOG 2018; 126:271-279. [DOI: 10.1111/1471-0528.15434] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/29/2018] [Indexed: 11/28/2022]
Affiliation(s)
- CWC Cheung
- Assisted Reproductive Technology Unit Department of Obstetrics and Gynaecology Faculty of Medicine The Chinese University of Hong Kong Hong Kong China
| | - SH Saravelos
- Assisted Reproductive Technology Unit Department of Obstetrics and Gynaecology Faculty of Medicine The Chinese University of Hong Kong Hong Kong China
| | - TYA Chan
- Department of Psychology The Chinese University of Hong Kong Hong Kong China
| | - DS Sahota
- Assisted Reproductive Technology Unit Department of Obstetrics and Gynaecology Faculty of Medicine The Chinese University of Hong Kong Hong Kong China
| | - CC Wang
- Assisted Reproductive Technology Unit Department of Obstetrics and Gynaecology Faculty of Medicine The Chinese University of Hong Kong Hong Kong China
| | - PW Chung
- Assisted Reproductive Technology Unit Department of Obstetrics and Gynaecology Faculty of Medicine The Chinese University of Hong Kong Hong Kong China
| | - TC Li
- Assisted Reproductive Technology Unit Department of Obstetrics and Gynaecology Faculty of Medicine The Chinese University of Hong Kong Hong Kong China
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Hui SYA, Sahota DS, Lao TT. Impact of Maternal BMI on Rubella Nonimmunity at Antenatal Screening. Obesity (Silver Spring) 2018; 26:1392-1395. [PMID: 30120821 DOI: 10.1002/oby.22244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 05/24/2018] [Accepted: 05/25/2018] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The aim of this study was to examine the relationship between BMI and the incidence of rubella nonimmunity among pregnant women with regard to the World Health Organization categories. METHODS This was a retrospective cohort study of 117,063 eligible gravidas, managed between 1998 and 2015 in a university hospital of Hong Kong, China. BMI at antenatal booking was banded using the following World Health Organization definitions: < 18.5 kg/m2 , 18.5 to 24.9 kg/m2 , 25.0 to 29.9 kg/m2 , and ≥30.0 kg/m2 . Maternal rubella nonimmunity status by BMI was assessed. Incidence rates were also assessed after adjusting for maternal advanced age, short stature < 151 cm, mothers' birthplace, and postobstetric history covariates. RESULTS Rubella nonimmunity incidence increased as the BMI increased (P < 0.001). Gravidas with high BMI were more likely to be nonimmune if born in Hong Kong (odds ratio [OR], 1.234; 95% CI: 1.159-1.315; P < 0.001) compared with those born outside of Hong Kong (OR, 1.066; 95% CI: 0.997-1.141; P = 0.063). After adjusting for covariates, women with BMI ≥ 25 kg/m2 had 1.127 (P < 0.001; 95% CI: 1.074-1.182) greater odds of being nonimmune. CONCLUSIONS High maternal BMI (≥ 25.0 kg/m2 ) is associated with reduced rubella immunity, an effect confined to gravidas with almost complete vaccine coverage in childhood.
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Affiliation(s)
- Shuk Yi Annie Hui
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China
| | - Daljit S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China
| | - Terence T Lao
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China
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Chan WWY, Chaemsaithong P, Lim WT, Tse AWT, Kwan AHW, Leung TY, Sahota DS, Poon LC. Pre-Induction Transperineal Ultrasound Assessment for the Prediction of Labor Outcome. Fetal Diagn Ther 2018; 45:256-267. [PMID: 30121653 DOI: 10.1159/000489122] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 04/09/2018] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To examine (1) the concordance of manual and automated para-symphyseal angle of progression (psAOP) measurements, (2) the repeatability of psAOP, head-symphysis distance, head-perineum distance, and sonographic cervical dilatation, and (3) the value of transperineal ultrasound (TPU) in predicting induction of labor (IOL) outcome. METHODS We performed a prospective study in 308 women with singleton pregnancies undergoing IOL at term. Logistic regression analysis was used to determine which maternal factors, Bishop score, method of IOL, and TPU parameters were significant predictors of cesarean section (CS) and CS due to no progress (CS-NP). RESULTS There was vaginal delivery in 225 (83.0%) and CS in 46 (17.0%) cases. The intra-class correlation coefficient between manual and automated psAOP was 0.866, but automated psAOP was 4.6° wider than manual measurement. All TPU parameters had an inter-observer intra-class correlation coefficient > 0.800. Significant independent prediction of CS and CS-NP was provided by maternal factors, previous vaginal delivery, and psAOP. There was no improvement in area under the receiver-operating characteristic curve with the addition of psAOP to maternal factors. CONCLUSIONS All TPU parameters are reproducible. Comparing the three TPU parameters for fetal head station, only psAOP is a significant independent predictor of CS; however, it is unlikely to be useful in predicting IOL outcome.
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Affiliation(s)
- Winnie W Y Chan
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Piya Chaemsaithong
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Wen Teng Lim
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Ada W T Tse
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Angel H W Kwan
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Tak Yeung Leung
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Daljit S Sahota
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Liona C Poon
- Department of Obstetrics and Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong,
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Cheng Y, Leung TY, Lao T, Chan YM, Sahota DS. Impact of replacing Chinese ethnicity-specific fetal biometry charts with the INTERGROWTH-21(st) standard. BJOG 2018; 123 Suppl 3:48-55. [PMID: 27627597 DOI: 10.1111/1471-0528.14008] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/09/2016] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To assess the impact of adopting the INTERGROWTH-21(st) biometry standards in a Chinese population. DESIGN Retrospective cohort study. SETTING A teaching hospital in Hong Kong. POPULATION A total of 10 527 Chinese women with a singleton pregnancy having a second- or third-trimester fetal anomaly or growth scan between January 2009 and June 2014. METHODS Z-scores were derived for fetal abdominal circumference (AC), head circumference (HC), and femur length (FL) using the INTERGROWTH-21(st) and Chinese biometry standards. Pregnancies with aneuploidy, structural or skeletal abnormalities, or that developed pre-eclampsia were excluded. Z-scores were stratified as <2.5th, <5th, <10th, >90th, >95th, or >97.5th percentile. Birthweight centile, adjusted for gestation and gender, was categorised as ≤3rd, 3rd to ≤5th, 5th to ≤10th, and >10th. Pairwise comparison and the McNemar test were performed to assess biometry Z-score differences and concordance between the INTERGROWTH-21(st) and Chinese standards. MAIN OUTCOME MEASURES The sensitivity of both the local and INTERGROWTH-21(st) AC standards to identify pregnancies that were small-for-gestational-age (SGA) was assessed. RESULTS INTERGROWTH-21(st) AC, HC, and FL Z-scores were significantly lower than those obtained using our local reference for AC, HC, and FL (P < 0.0001 for all). The proportion of fetuses with biometry in the <2.5th, <5th, <10th, >90th, >95th, or >97.5th percentiles was statistically significant (P < 0.01 for all). A total of 1224 (15.5%) of the scans at 18-22 weeks of gestation had AC, HC, or FL below the 3rd percentile of the INTERGROWTH-21(st) standard. CONCLUSIONS Adopting the INTERGROWTH-21(st) standard would lead to a significant number of fetuses being at risk of misdiagnosis for small fetal size, particularly when using HC and FL measures. TWEETABLE ABSTRACT INTERGROWTH-21(st) biometry assessment in Chinese leads to fetuses being at risk of misdiagnosis of small fetal size.
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Affiliation(s)
- Yky Cheng
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, China
| | - T Y Leung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, China
| | - Tth Lao
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, China
| | - Y M Chan
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, China
| | - D S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, China.
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Cheng YK, Law LW, Leung TY, Chan OK, Sahota DS. Soluble fms-like tyrosine kinase-1 and placental growth factor in Chinese pregnant women during second and third trimesters. Hong Kong Med J 2018; 24 Suppl 3:45-47. [PMID: 29937448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023] Open
Affiliation(s)
- Y Ky Cheng
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong
| | - L W Law
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong
| | - T Y Leung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong
| | - O K Chan
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong
| | - D S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong
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Cheng YKY, Lu J, Leung TY, Chan YM, Sahota DS. Prospective assessment of INTERGROWTH-21 st and World Health Organization estimated fetal weight reference curves. Ultrasound Obstet Gynecol 2018; 51:792-798. [PMID: 28452092 DOI: 10.1002/uog.17514] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 04/19/2017] [Accepted: 04/21/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVES To assess the suitability of the new INTERGROWTH-21st and World Health Organization (WHO) estimated fetal weight (EFW) references in a Southern Chinese population. A secondary aim was to determine the accuracy of EFW by assessing the difference between EFW and actual birth weight. METHODS This was a prospective cross-sectional cohort study. Viable singleton pregnancies at 11-13 weeks' gestation were recruited to undergo a single standardized fetal biometric scan after 20 weeks. The gestational age at which the scan was performed was allocated randomly at the time of recruitment. EFW was predicted using both the Hadlock and INTERGROWTH-21st weight estimation model formulae. Population-specific EFW references were constructed. Z-scores were used to compare these references against the INTERGROWTH-21st and WHO international size references. Gestational-age-adjusted projection was used to assess the difference between EFW on the day of delivery and birth weight for fetuses having biometry scans ≥ 34 weeks. RESULTS Fetuses of 970 participants had biometry scans. The median number of scans per gestational week was 48 (interquartile range, 43-53). Z-score comparison indicated that the WHO 10th , 50th and 90th centiles of the EFW reference were consistently higher than the corresponding local centiles, whilst the INTERGROWTH-21st 10th centile was lower. Fewer than 2% of fetuses scanned at or after 34 weeks would be considered as potentially large-for-gestational age, irrespective of which model was used to predict weight. Adopting the WHO international reference would result in approximately one in six fetuses being regarded as potentially small-for-gestational age, 50% more than the number determined using a population-specific reference. Systematic errors of extrapolated EFW were similar, ranging from 5.5% to 7.4%. CONCLUSIONS Centers seeking to use new references, such as the INTERGROWTH-21st and/or WHO international references, as a means of determining whether a fetus is small- or large-for-gestational age, would be advised to assess the suitability of these references within their own population using standardized methodology. Copyright © 2017 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- Y K Y Cheng
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, SAR, China
| | - J Lu
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, SAR, China
| | - T Y Leung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, SAR, China
| | - Y M Chan
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, SAR, China
| | - D S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, SAR, China
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Lao TT, Sahota DS, Chan PKS. Three decades of neonatal vaccination has greatly reduced antenatal prevalence of hepatitis B virus infection among gravidae covered by the program. J Infect 2018; 76:543-549. [PMID: 29742467 DOI: 10.1016/j.jinf.2018.04.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 04/17/2018] [Accepted: 04/20/2018] [Indexed: 02/07/2023]
Abstract
OBJECTIVES To evaluate the impact of three decades of hepatitis B vaccination in infancy on antenatal prevalence of hepatitis B surface antigen (HBsAg) carriage in 93,134 Hong-Kong born gravidae managed in 1997-2015. METHODS Annual prevalence of HBsAg carriage on routine antenatal screening was examined with respect to maternal year of birth in three periods i.e. pre-1983 (before availability of vaccination), 1983-1988 (vaccination of infants born to HBsAg-carriers), and after 1988 (universal vaccination). RESULTS Overall HBsAg carriage was 8.3% (7737/93,134), decreasing from 10.5% in 1997 to 6.5% in 2015 (p < 0.001), and from 8.8%, 7.0% to 3.1%, respectively, for the three period-of-birth cohorts (p < 0.001). Annual prevalence decreased from 9.9% in 1997 to 7.5% in 2015 (p < 0.001) in the pre-1983 cohort, but showed neither difference nor trend in the other two cohorts. However, the annual prevalence showed significantly falling trends from the pre-1983 to the post-1988 cohorts for the years 2007-2008 and 2010-2015. CONCLUSIONS A progressive decline in overall annual prevalence of antenatal HBsAg carriage was found, with a consistently significant decline among the three cohorts for the years 2007-2008 and 2010-2015, providing evidence that universal hepatitis B vaccination in infancy has reduced significantly antenatal prevalence of HBsAg carriage in Hong Kong.
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Affiliation(s)
- Terence T Lao
- Departments of Obstetrics & Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin NT, Hong Kong, China.
| | - Daljit S Sahota
- Departments of Obstetrics & Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin NT, Hong Kong, China
| | - Paul K S Chan
- Microbiology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China
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Fung E, Hui E, Yang X, Lui LT, Cheng KF, Li Q, Fan Y, Sahota DS, Ma BHM, Lee JSW, Lee APW, Woo J. Heart Failure and Frailty in the Community-Living Elderly Population: What the UFO Study Will Tell Us. Front Physiol 2018; 9:347. [PMID: 29740330 PMCID: PMC5928128 DOI: 10.3389/fphys.2018.00347] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Accepted: 03/20/2018] [Indexed: 12/11/2022] Open
Abstract
Heart failure and frailty are clinical syndromes that present with overlapping phenotypic characteristics. Importantly, their co-presence is associated with increased mortality and morbidity. While mechanical and electrical device therapies for heart failure are vital for select patients with advanced stage disease, the majority of patients and especially those with undiagnosed heart failure would benefit from early disease detection and prompt initiation of guideline-directed medical therapies. In this article, we review the problematic interactions between heart failure and frailty, introduce a focused cardiac screening program for community-living elderly initiated by a mobile communication device app leading to the Undiagnosed heart Failure in frail Older individuals (UFO) study, and discuss how the knowledge of pre-frailty and frailty status could be exploited for the detection of previously undiagnosed heart failure or advanced cardiac disease. The widespread use of mobile devices coupled with increasing availability of novel, effective medical and minimally invasive therapies have incentivized new approaches to heart failure case finding and disease management.
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Affiliation(s)
- Erik Fung
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Sha Tin, Hong Kong
- Laboratory for Heart Failure and Circulation Research, Li Ka Shing Institute of Health Sciences, Prince of Wales Hospital, Sha Tin, Hong Kong
- Faculty of Medicine, Gerald Choa Cardiac Research Centre, Chinese University of Hong Kong, Sha Tin, Hong Kong
| | - Elsie Hui
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Sha Tin, Hong Kong
- Department of Medicine and Geriatrics, Shatin Hospital, Sha Tin, Hong Kong
| | - Xiaobo Yang
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Sha Tin, Hong Kong
- Laboratory for Heart Failure and Circulation Research, Li Ka Shing Institute of Health Sciences, Prince of Wales Hospital, Sha Tin, Hong Kong
- PhD Programme in Medical Sciences, Division of Medical Sciences, Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Leong T. Lui
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Sha Tin, Hong Kong
- Laboratory for Heart Failure and Circulation Research, Li Ka Shing Institute of Health Sciences, Prince of Wales Hospital, Sha Tin, Hong Kong
| | - King F. Cheng
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Sha Tin, Hong Kong
- Laboratory for Heart Failure and Circulation Research, Li Ka Shing Institute of Health Sciences, Prince of Wales Hospital, Sha Tin, Hong Kong
| | - Qi Li
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Sha Tin, Hong Kong
- Laboratory for Heart Failure and Circulation Research, Li Ka Shing Institute of Health Sciences, Prince of Wales Hospital, Sha Tin, Hong Kong
- PhD Programme in Medical Sciences, Division of Medical Sciences, Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Yiting Fan
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Sha Tin, Hong Kong
- PhD Programme in Medical Sciences, Division of Medical Sciences, Department of Medicine and Therapeutics, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Daljit S. Sahota
- Department of Obstetrics and Gynaecology, Faculty of Medicine, Chinese University of Hong Kong, Sha Tin, Hong Kong
| | - Bosco H. M. Ma
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Sha Tin, Hong Kong
- Department of Medicine and Geriatrics, Shatin Hospital, Sha Tin, Hong Kong
| | - Jenny S. W. Lee
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Sha Tin, Hong Kong
- Department of Medicine, Alice Ho Miu Ling Nethersole Hospital and Tai Po Hospital, Tai Po, Hong Kong
| | - Alex P. W. Lee
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Sha Tin, Hong Kong
| | - Jean Woo
- Department of Medicine and Therapeutics, Faculty of Medicine, Chinese University of Hong Kong, Sha Tin, Hong Kong
- CUHK Jockey Club Institute of Ageing, Chinese University of Hong Kong, Sha Tin, Hong Kong
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Cheng YKY, Leung WC, Leung TY, Choy KW, Chiu RWK, Lo TK, Kwok KY, Sahota DS. Women's preference for non-invasive prenatal DNA testing versus chromosomal microarray after screening for Down syndrome: a prospective study. BJOG 2018; 125:451-459. [DOI: 10.1111/1471-0528.15022] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/07/2017] [Indexed: 02/02/2023]
Affiliation(s)
- YKY Cheng
- Department of Obstetrics and Gynaecology; The Chinese University of Hong Kong; Hong Kong China
| | - WC Leung
- Department of Obstetrics and Gynaecology; Kwong Wah Hospital; Hong Kong China
| | - TY Leung
- Department of Obstetrics and Gynaecology; The Chinese University of Hong Kong; Hong Kong China
| | - KW Choy
- Department of Obstetrics and Gynaecology; The Chinese University of Hong Kong; Hong Kong China
| | - RWK Chiu
- Department of Chemical Pathology; The Chinese University of Hong Kong; Hong Kong China
| | - T-K Lo
- Department of Obstetrics and Gynaecology; Princess Margaret Hospital; Hong Kong China
| | - KY Kwok
- Department of Obstetrics and Gynaecology; The Chinese University of Hong Kong; Hong Kong China
| | - DS Sahota
- Department of Obstetrics and Gynaecology; The Chinese University of Hong Kong; Hong Kong China
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Cheng Y, Leung TY, Law LW, Ting YH, Law KM, Sahota DS. First trimester screening for pre-eclampsia in Chinese pregnancies: case-control study. BJOG 2018; 125:442-449. [PMID: 29032578 DOI: 10.1111/1471-0528.14970] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/09/2017] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To assess the potential of screening for pre-eclampsia (PE) in a Chinese population. DESIGN Case-control study. SETTING Teaching hospital in Hong Kong. POPULATION A total of 3330 women having a viable singleton pregnancy attending first-trimester Down-syndrome screening. METHODS Mean arterial pressure (MAP), bilateral uterine artery pulsatility index (UtA-PI), and placental growth factor (PlGF) were measured. Screening markers were transformed to multiples of the gestational median (MoM) and adjusted for maternal and pregnancy characteristics. MoM distributions in PE and non-PE pregnancies were compared with published expected values. PE screening performance was assessed using area under receiver operating curves (AUROC). MAIN OUTCOME MEASURES PE detection rate. RESULTS A total of 30 (0.9%) women developed either early (<34 weeks) or late (≥34 weeks) onset PE. MAP was dependent on maternal BMI, UtA-PI on fetal crown rump length, uterine artery peak systolic velocity (UtA-PSV) on maternal age and gestation, and PlGF on gestation in non-PE pregnancies. MoM distributions determined using published Fetal Medicine Foundation models deviated significantly from one for both MAP (P < 0.0001) and PI (P < 0.0001), but not PlGF (P = 0.52) in non-PE pregnancies, whilst PlGF MoM distributions in those who developed early as opposed to late onset PE were significantly higher (P = <0.05). AUROC for any PE using multiple markers was 0.72 (95% CI: 0.64-0.81) with detection rates of 72 and 55% for early and late PE, respectively, for a 10% false positive rate. CONCLUSION Detection rates for PE in our Chinese population were lower than the expected 90-95% even after adjusting MoM for local women's characteristics. FUNDING General Research Fund (Project number 470513). TWEETABLE ABSTRACT Pre-eclampsia screening in the Chinese population had detection rates lower than previously published results.
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Affiliation(s)
- Yky Cheng
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China
| | - T Y Leung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China
| | - L W Law
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China
| | - Y H Ting
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China
| | - K M Law
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China
| | - D S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong, China
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Abstract
PURPOSE The relationship between maternal height and gestational hypertensive disorders was examined in a cohort of Chinese gravidae managed in 1997-2013 to clarify the association between short stature with preeclampsia (PE) and gestational hypertension (GH). MATERIALS AND METHODS Retrospective study of 87 290 gravidae categorized by their height into four quartile groups. The impact of short stature, defined as height in the lowest quartile, on incidence of PE and GH was studied in relation to the presence of risk factors. The independent role of short stature was determined by regression analysis. RESULTS The 25th, 50th, and 75th percentile values of height were 154 cm, 158 cm, and 161 cm respectively. The incidence of PE, but not GH, was inversely correlated with height (p = .025). Short stature altered the impact of parity status, advanced age, high body mass index, infant gender, and medical history, on incidence of PE but not GH. On regression analysis, short stature increased risk of PE (adjusted RR 1.134, 95%CI 1.005-1.279) but reduced GH (adjusted RR 0.836, 95%CI 0.718-0.974). CONCLUSIONS Maternal short stature should be defined according to distribution in a specific ethnic group, and it exerts a significant but opposite effect on the incidence of PE versus GH.
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Affiliation(s)
- Terence T Lao
- a Department of Obstetrics & Gynecology , The Chinese University of Hong Kong , Hong Kong SAR , People's Republic of China.,b Prince of Wales Hospital , Hong Kong SAR , People's Republic of China
| | - Annie S Y Hui
- a Department of Obstetrics & Gynecology , The Chinese University of Hong Kong , Hong Kong SAR , People's Republic of China.,b Prince of Wales Hospital , Hong Kong SAR , People's Republic of China
| | - Daljit S Sahota
- a Department of Obstetrics & Gynecology , The Chinese University of Hong Kong , Hong Kong SAR , People's Republic of China.,b Prince of Wales Hospital , Hong Kong SAR , People's Republic of China
| | - Tak-Yeung Leung
- a Department of Obstetrics & Gynecology , The Chinese University of Hong Kong , Hong Kong SAR , People's Republic of China.,b Prince of Wales Hospital , Hong Kong SAR , People's Republic of China
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Hui SYA, Sahota DS, Lao TT. Impact of the two-dose rubella vaccination regimen on incidence of rubella seronegativity in gravidae aged 25 years and younger. PLoS One 2017; 12:e0183630. [PMID: 28854204 PMCID: PMC5576672 DOI: 10.1371/journal.pone.0183630] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 08/08/2017] [Indexed: 11/19/2022] Open
Abstract
Objective This study compared the incidence of rubella seronegativity among gravidae of 25 year-old and younger, between those born in Hong Kong after 1983 when the two-dose rubella vaccination was implemented, versus gravidae born before, to examine the impact of the two-dose regimen. Methods In this retrospective cohort study, the incidence of antenatal rubella seronegativity in our parturients managed in1997-2015 was analysed by their age from ≤16 to 25 years, and the effect of year of birth was determined adjusting for confounding factors including teenage status, obstetric history, anthropometric factors, and health parameters including anaemia, thalassaemia trait and hepatitis B carrier status. Results Among the 12743 gravidae, the 6103 gravidae born after 1983 had overall higher rubella seronegativity (9.1% versus 4.4%, OR 2.061, 95% CI 1.797–2.364), with significant difference (p = 0.006) and inverse correlation (p<0.001) with age, in contrast to the 6640 gravidae born in/before 1983 whom there was significant difference (p = 0.027) but a positive correlation (p = 0.008) with age. For each year of age, the former had significantly higher incidence of rubella seronegativity except for those of ≤16 years. Regression analysis confirmed that birth after 1983 was independently associated with rubella seronegativity (aOR 2.207, 95% CI 1.902–2.562). Conclusion There was a significant trend between rubella seronegativity with age in young gravidae, but the pattern was opposite between gravidae born after versus in/before 1983, with the former having a higher incidence of seronegativity at all ages. Young women covered by the two-dose rubella immunisation programme have a paradoxically higher incidence of rubella seronegativity.
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Affiliation(s)
- Shuk Yi Annie Hui
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
| | - Daljit S Sahota
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
| | - Terence T Lao
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong, Hong Kong, People's Republic of China
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Lao TT, Hui ASY, Sahota DS. Prior pregnancy and antenatal rubella sero-negativity-evidence of persistent maternal immunologic alteration? Am J Reprod Immunol 2017; 78. [PMID: 28653441 DOI: 10.1111/aji.12727] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 06/05/2017] [Indexed: 12/01/2022] Open
Abstract
PROBLEM It is unclear if the immunologic alterations induced by pregnancy could persist. METHOD OF STUDY Antenatal rubella sero-negativity was correlated with gravidity, abortions and parity in 112 083 gravidae managed during 1997-2015, with further analysis stratified for factors known to influence rubella serology. RESULTS The 10.2% sero-negative gravidae had different characteristics, and the incidence showed significant difference and positive trend (P<.001 for both) with gravidity, abortions and parity. The pattern remained consistent when analysis was stratified for advanced age, high body mass index and medical history, but was negated by hepatitis B virus infection except for abortions, and by high body mass index for parity. For gravidity 2-4, no difference in rubella sero-negativity was found between gravidae with all previous pregnancies ended in abortion vs delivery. CONCLUSION Prior pregnancies diminished rubella immunity in a dose-dependent manner, which may be a reflection of the cumulative effect of pregnancy-associated maternal immunologic alteration.
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Affiliation(s)
- Terence T Lao
- Department of Obstetrics & Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Annie S Y Hui
- Department of Obstetrics & Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
| | - Daljit S Sahota
- Department of Obstetrics & Gynaecology, Prince of Wales Hospital, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China
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Abstract
INTRODUCTION Triplet and higher-order multiple pregnancies are well known to be associated with increased adverse outcomes. This study reviewed the perinatal outcomes in women with a triplet pregnancy who underwent fetal reduction versus expectant management at a university hospital in Hong Kong. METHODS This was a retrospective review of triplet pregnancies at Prince of Wales Hospital in Hong Kong from 1 January 2008 to 30 September 2014. Women carrying a triplet pregnancy were classified as having had expectant management, fetal reduction to twins, or fetal reduction to a singleton. Maternal and pregnancy characteristics were compared. Outcome measures included fetal loss, gestational age at delivery, birth weight, neonatal survival rate, neonatal death, neonatal complications, and need for and length of neonatal intensive care unit stay. RESULTS A total of 52 triplet pregnancies were identified. One pregnancy that was lost to follow-up and one that was terminated were excluded. The majority of pregnancies (84%) were the result of assisted reproductive technology. Fetal reduction was performed in 26 (52%) pregnancies, of which 22 were reduced to twins and four to a singleton. The mean gestations at delivery were 32.6, 35.2, and 39.6 weeks in the expectant management, fetal reduction to twins, and fetal reduction to a singleton groups, respectively. Significantly more pregnancies with expectant management resulted in a preterm birth. All pregnancies with fetal reduction to a singleton resulted in a term birth. A higher mean birth weight, lower neonatal death rate, and reduced need for admission to and length of stay in the neonatal intensive care unit were observed in the fetal reduction groups. CONCLUSIONS Approximately 50% of women with a triplet pregnancy in Hong Kong elected to undergo fetal reduction. This was associated with a significant reduction in extreme preterm delivery and associated morbidity and mortality.
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Affiliation(s)
- W T Tse
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
| | - L W Law
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
| | - D S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
| | - T Y Leung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
| | - Y Ky Cheng
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong
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Lao TT, Sahota DS. Pregnancy and maternal chronic hepatitis B infection-Evidence of reproductive advantage? Am J Reprod Immunol 2017; 77. [PMID: 28370686 DOI: 10.1111/aji.12667] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 02/17/2017] [Indexed: 12/14/2022] Open
Abstract
PROBLEM As multiparas have high prevalence of chronic hepatitis B virus (HBV) infection, we examined here the relationship between the number of pregnancies with HBV infection. METHOD OF STUDY Retrospective cohort study examining the prevalence of HBV infection by actual gravidity and parity in 104 242 gravidae managed during 1997-2013. RESULTS Infection rate increased from 8.5% to 10.6% for G1 to G≥6 and from 8.8% to 10.0% for P0 to P≥3 (P<.001). When stratified by parity, correlation with gravidity was maintained in the nulliparous gravidae. For the same gravidity, increasing parity was associated with higher rate of HBV infection for G2 and G3. Multiparas had higher HBV infection prevalence (all >10%) than nulliparas (<10%) for G2 to G≥4. CONCLUSION Prior pregnancies, especially successful ones, are associated with increased HBV infection in an endemic population, which could have enhanced reproduction and in the process facilitated its transmission to the following generations.
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Affiliation(s)
- Terence T Lao
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, China
| | - Daljit S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, China
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Lao TT, Sahota DS, Law LW, Leung TY. Maternal rubella immunity status and pre-eclampsia. Am J Reprod Immunol 2017; 78. [PMID: 28370838 DOI: 10.1111/aji.12677] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 02/23/2017] [Indexed: 01/15/2023] Open
Abstract
PROBLEM To determine if maternal immune maladaptation associated with pre-eclampsia is reflected in the rubella immunity status. METHOD OF STUDY Incidence of pre-eclampsia was compared between rubella non-immune and immune gravidae carrying a singleton pregnancy beyond 24 weeks, taking into account maternal characteristics and reported risk factors for pre-eclampsia. RESULTS The 9870 (10.4%) rubella non-immune gravidae among the 95 024 in the cohort exhibited no difference in incidence of underlying medical disorders, but they were slightly but significantly older, shorter, heavier, and had more pre-eclampsia (OR 1.24, 95% CI 1.05-1.47) despite having fewer nulliparas. Regression analysis confirmed an overall association between rubella non-immunity with pre-eclampsia (aOR 1.27, 95% CI 1.06-1.54), which was related to multiparas (aOR 1.42, 95% CI 1.05-1.91) and carrying a male fetus (aOR 1.37, 95% CI 1.06-1.78). CONCLUSION The association between rubella non-immunity and pre-eclampsia reflects immune maladaptation in multiparas and toward a male fetus.
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Affiliation(s)
- Terence T Lao
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong and Prince of Wales Hospital, Shatin, Hong Kong
| | - Daljit S Sahota
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong and Prince of Wales Hospital, Shatin, Hong Kong
| | - Lai-Wa Law
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong and Prince of Wales Hospital, Shatin, Hong Kong
| | - Tak-Yeung Leung
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong and Prince of Wales Hospital, Shatin, Hong Kong
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Li B, Sahota DS, Lao TT, Xu J, Hu SQ, Zhang L, Liu QY, Sun Q, Tang D, Ma RM. Applicability of first-trimester combined screening for fetal trisomy 21 in a resource-limited setting in mainland China. BJOG 2016; 123 Suppl 3:23-9. [PMID: 27627592 DOI: 10.1111/1471-0528.14004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/26/2016] [Indexed: 11/29/2022]
Affiliation(s)
- B Li
- Department of Obstetrics and Gynaecology; The First Affiliated Hospital of Kunming Medical University; Kunming Yunnan China
| | - DS Sahota
- Department of Obstetrics and Gynaecology; The Chinese University of Hong Kong; Prince of Wales Hospital; Hong Kong SAR China
| | - TT Lao
- Department of Obstetrics and Gynaecology; The Chinese University of Hong Kong; Prince of Wales Hospital; Hong Kong SAR China
| | - J Xu
- Department of Obstetrics and Gynaecology; The First Affiliated Hospital of Kunming Medical University; Kunming Yunnan China
| | - SQ Hu
- Department of Obstetrics and Gynaecology; The First Affiliated Hospital of Kunming Medical University; Kunming Yunnan China
| | - L Zhang
- Department of Obstetrics and Gynaecology; The First Affiliated Hospital of Kunming Medical University; Kunming Yunnan China
| | - QY Liu
- Department of Obstetrics and Gynaecology; The First Affiliated Hospital of Kunming Medical University; Kunming Yunnan China
| | - Q Sun
- Department of Obstetrics and Gynaecology; The First Affiliated Hospital of Kunming Medical University; Kunming Yunnan China
| | - D Tang
- Department of Obstetrics and Gynaecology; The First Affiliated Hospital of Kunming Medical University; Kunming Yunnan China
| | - RM Ma
- Department of Obstetrics and Gynaecology; The First Affiliated Hospital of Kunming Medical University; Kunming Yunnan China
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Duncan KR, Sahota DS, Gowland PA, Moore R, Chang A, Baker PN, Johnson IR. Multilevel Modeling of Fetal and Placental Growth Using Echo-Planar Magnetic Resonance Imaging. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/107155760100800505] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Keith R. Duncan
- School of Human Development, Magnetic Resonance Centre, Department of Physics, Nottingham University, Nottingham, United Kingdom: and Department of Obstetrics & Gynaecology, Prince of Wales Hospital, Shatin, NT, Hong Kong; University Department of Obstetrics and Gynaecology, City Hospital, Hucknall Road, Nottingham, United Kingdom, NG5 1PB
| | | | | | | | | | | | - Ian R. Johnson
- School of Human Development, Magnetic Resonance Centre, Department of Physics, Nottingham University, Nottingham, United Kingdom: and Department of Obstetrics & Gynaecology, Prince of Wales Hospital, Shatin, NT, Hong Kong
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Lao TT, Sahota DS. Antenatal Rubella Non-immunity Status and Incidence of Pre-eclampsia. J Reprod Immunol 2016. [DOI: 10.1016/j.jri.2016.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lao TT, Sahota DS. Antenatal rubella non-immunity status and incidence of pre-eclampsia. J Reprod Immunol 2016. [DOI: 10.1016/j.jri.2016.04.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Lao TT, Sahota DS, Law LW, Leung TY. Rubella seronegativity in antenatal screening - Is it influenced by the introduction of universal childhood rubella immunization? Vaccine 2015; 33:4776-81. [PMID: 26271826 DOI: 10.1016/j.vaccine.2015.07.105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 07/22/2015] [Accepted: 07/29/2015] [Indexed: 11/18/2022]
Abstract
OBJECTIVE This study examined the impact of rubella immunization, implemented in Hong Kong in phases since 1978, on antenatal rubella serological status in Chinese women. METHODS In a retrospective cohort study, the incidence of antenatal rubella seronegative status in our parturients managed from 1998 to 2013 was analyzed by their year-of-birth as follows: <1965 (no childhood immunization), 1965-1982 (single dose at Primary 6), and ≥1983 (two doses at age 12 months and 12 years), adjusting for other factors including age, parity, body mass index, place-of-birth status and hepatitis B surface antigen (HBsAg) status. FINDINGS Rubella seronegativity decreased from 12.9%, 10.5%, to 9.8% respectively, and correlated inversely (P<0.001) with year-of-birth cohorts. Despite similar demographic profiles, this correlation was found only in Hong-Kong-born women (from 12.6%, 7.5% to 6.5% respectively), who also had significant lower incidences of rubella seronegativity (OR 0.73, 0.31 and 0.29 respectively) and HBsAg seropositivity (OR 1.09, 0.63 and 0.48 respectively) than China-born women. On regression analysis, rubella seronegativity was actually significantly increased following the implementation of immunization (aOR 1.20) while it was the reverse for non-residents (aOR 0.61). CONCLUSION Although rubella seronegativity decreased with immunization, the effect was less than expected when adjusted for other risk factors.
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Affiliation(s)
- Terence T Lao
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong, China.
| | - Daljit S Sahota
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong, China.
| | - Lai-Wa Law
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong, China.
| | - Tak-Yeung Leung
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, NT, Hong Kong, China.
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Wong ASW, Lao TTH, Cheung CW, Yeung SW, Fan HL, Ng PS, Yuen PM, Sahota DS. Reappraisal of endometrial thickness for the detection of endometrial cancer in postmenopausal bleeding: a retrospective cohort study. BJOG 2015; 123:439-46. [PMID: 25800522 DOI: 10.1111/1471-0528.13342] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/11/2015] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To estimate the accuracy of transvaginal ultrasound (TVS) measurement of endometrial thickness (ET) in diagnosing endometrial cancer in postmenopausal women with vaginal bleeding (PMB). DESIGN Retrospective cohort study. SETTING One-stop PMB clinic in a Hong Kong teaching hospital. POPULATION A cohort of 4383 women with PMB. METHODS Transvaginal ultrasonic measurement of ET and endometrial biopsies were obtained in women presenting with PMB between 2002 and 2013. Endometrial histology was used as the reference standard to calculate accuracy estimates. MAIN OUTCOME MEASURES Accuracy data for TVS ET presented as sensitivity, specificity, and area under the receiver operator characteristic (ROC) curve. RESULTS Endometrial cancer was diagnosed in 3.8% of women. The median ET in those with endometrial cancer was significantly higher than those with benign conditions (15.7 versus 3.2 mm, P < 0.001). The area under the ROC curve was 0.92 (95% CI 0.89-0.94). The sensitivity for the detection of endometrial cancer at 3-, 4-, and 5-mm cut-offs were 97.0% (95% CI 94.5-99.6%), 94.1% (95% CI 90.5-97.6%), and 93.5% (95% CI 89.7-97.2%), respectively. The corresponding estimates of specificity at these thresholds were 45.3% (95% CI 43.8-46.8%), 66.8% (65.4-68.2%), and 74.0% (72.7-75.4%). CONCLUSIONS Transvaginal ultrasound using a 3-mm cut-off has high sensitivity for detecting endometrial cancer and can identify women with PMB who are highly unlikely to have endometrial cancer, thereby avoiding more invasive endometrial biopsy.
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Affiliation(s)
- A S-W Wong
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong City, Hong Kong
| | - T T-H Lao
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong City, Hong Kong
| | - C W Cheung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong City, Hong Kong
| | - S W Yeung
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong City, Hong Kong
| | - H L Fan
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong City, Hong Kong
| | - P S Ng
- Department of Obstetrics and Gynaecology, Union Hospital, Hong Kong City, Hong Kong
| | - P M Yuen
- Department of Obstetrics and Gynaecology, Hong Kong Sanatorium & Hospital, Hong Kong City, Hong Kong
| | - D S Sahota
- Department of Obstetrics and Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Hong Kong City, Hong Kong
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Lao TT, Sahota DS, Chung MK, Cheung TKW, Cheng YKY, Leung TY. Maternal ABO and rhesus blood group phenotypes and hepatitis B surface antigen carriage. J Viral Hepat 2014; 21:818-23. [PMID: 24325347 DOI: 10.1111/jvh.12219] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Accepted: 09/17/2013] [Indexed: 01/05/2023]
Abstract
In view of a persistently high prevalence of hepatitis B surface antigen (HBsAg) carriage in our obstetric population, we examined the association between HBsAg carriage with maternal ABO and rhesus (Rh) blood group phenotypes determined at routine antenatal screening. In a retrospective study, the antenatal screening results of women booked for confinement between 1998 and 2011 in our hospital were examined for the relationship between HBsAg carriage with the ABO and rhesus blood groups, taking into account also the effects of advanced maternal age (≥ 35 years) and parity status (nulliparous or multiparous), and year of birth before or following the availability of the hepatitis B vaccine (1984). HBsAg carriage was found in 9.9%, 9.6%, 9.1% and 10.2% (P = 0.037) for group-A (n = 20 581 or 26.1%), -B (n = 20 744 or 26.4%), -AB (n = 5138 or 6.5%) and -O (n = 32 242 or 41.0%) among the 78705 women in the study cohort. Rhesus negativity was found in 0.6%, and HBsAg carriage was 12.3% and 9.8%, respectively, for the Rh-negative and Rh-positive women (P = 0.071). Carriage rate between group-O and non-O was influenced by nulliparity, age ≥ 35 years and Rh-positive status. Regression analysis indicated that group-B (P = 0.044, aOR = 1.062, 95% CI 1.002-1.127) and group-AB (P = 0.016, aOR = 1.134, 95% CI 1.024-1.256) were associated with HBsAg carriage. Blood groups-B and -AB are associated with increased hepatitis B virus (HBV) infection in our population, and further studies are warranted to elucidate the implications of this on the sequelae of HBV infection.
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Affiliation(s)
- T T Lao
- Department of Obstetrics & Gynaecology, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong, China
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Lao TT, Sahota DS, Law LW, Cheng YKY, Leung TY. Age-specific prevalence of hepatitis B virus infection in young pregnant women, Hong Kong Special Administrative Region of China. Bull World Health Organ 2014; 92:782-9. [PMID: 25378739 PMCID: PMC4221762 DOI: 10.2471/blt.13.133413] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 06/23/2014] [Accepted: 07/08/2014] [Indexed: 12/13/2022] Open
Abstract
Objective To investigate the age-specific prevalence of hepatitis B virus (HBV) infection in young pregnant women in Hong Kong Special Administrative Region (SAR), China, and to determine whether an increase in prevalence occurs during adolescence. Methods HBV prevalence was quantified using data from routine antenatal screening for hepatitis B surface antigen (HBsAg) in 10 808 women aged 25 years or younger born in Hong Kong SAR and managed at a single hospital between 1998 and 2011. The effect on prevalence of maternal age, parity and birth before or after HBV vaccine availability in 1984 was assessed, using Spearman’s correlation and multiple logistic regression analysis. Findings Overall, 7.5% of women were HBsAg-positive. The prevalence ranged from 2.3% to 8.4% in those aged ≤ 16 and 23 years, respectively. Women born in or after 1984 and those younger than 18 years of age were less likely to be HBsAg-positive (odds ratio, OR: 0.679; 95% confidence interval, CI: 0.578–0.797) and (OR: 0.311; 95% CI: 0.160–0.604), respectively. For women born before 1984, there was no association between HBsAg carriage and being younger than 18 years of age (OR: 0.60; 95% CI: 0.262–1.370) Logistic regression analysis showed that the prevalence of HBsAg carriage was influenced more by the woman being 18 years old or older (adjusted OR, aOR: 2.80; 95% CI: 1.46–5.47) than being born before 1984 (aOR: 1.42; 95% CI: 1.21–1.67). Conclusion Immunity to HBV in young pregnant women who had been vaccinated as neonates decreased in late adolescence.
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Affiliation(s)
- Terence T Lao
- Department of Obstetrics and Gynaecology, Chinese University of Hong Kong, Prince of Wales Hospital, Ngan Shing Street, Shatin, New Territories, Hong Kong Special Administrative Region, China
| | - Daljit S Sahota
- Department of Obstetrics and Gynaecology, Chinese University of Hong Kong, Prince of Wales Hospital, Ngan Shing Street, Shatin, New Territories, Hong Kong Special Administrative Region, China
| | - Lai-Wa Law
- Department of Obstetrics and Gynaecology, Chinese University of Hong Kong, Prince of Wales Hospital, Ngan Shing Street, Shatin, New Territories, Hong Kong Special Administrative Region, China
| | - Yvonne K Y Cheng
- Department of Obstetrics and Gynaecology, Chinese University of Hong Kong, Prince of Wales Hospital, Ngan Shing Street, Shatin, New Territories, Hong Kong Special Administrative Region, China
| | - Tak-Yeung Leung
- Department of Obstetrics and Gynaecology, Chinese University of Hong Kong, Prince of Wales Hospital, Ngan Shing Street, Shatin, New Territories, Hong Kong Special Administrative Region, China
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Hui AS, Lao TT, Leung TY, Schaaf JM, Sahota DS. Trends in preterm birth in singleton deliveries in a Hong Kong population. Int J Gynaecol Obstet 2014; 127:248-53. [DOI: 10.1016/j.ijgo.2014.06.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 06/23/2014] [Accepted: 08/01/2014] [Indexed: 10/24/2022]
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Chung MY, Cheng YK, Yu SC, Sahota DS, Leung TY. Nonremoval of an abnormally invasive placenta at cesarean section with postoperative uterine artery embolization. Acta Obstet Gynecol Scand 2013; 92:1250-5. [DOI: 10.1111/aogs.12230] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Accepted: 07/31/2013] [Indexed: 11/30/2022]
Affiliation(s)
- Man Y. Chung
- Department of Obstetrics and Gynecology; Chinese University of Hong Kong; Prince of Wales Hospital; Hong Kong
| | - Yvonne K.Y. Cheng
- Department of Obstetrics and Gynecology; Chinese University of Hong Kong; Prince of Wales Hospital; Hong Kong
| | - Simon C.H. Yu
- Department of Imaging and Interventional Radiology; Chinese University of Hong Kong; Prince of Wales Hospital; Hong Kong
| | - Daljit S. Sahota
- Department of Obstetrics and Gynecology; Chinese University of Hong Kong; Prince of Wales Hospital; Hong Kong
| | - Tak Y. Leung
- Department of Obstetrics and Gynecology; Chinese University of Hong Kong; Prince of Wales Hospital; Hong Kong
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Lao TT, Sahota DS, Cheng YKY, Law LW, Leung TY. Advanced maternal age and postpartum hemorrhage – risk factor or red herring? J Matern Fetal Neonatal Med 2013; 27:243-6. [DOI: 10.3109/14767058.2013.807240] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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