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Bailey BA, Kopkau H, Nadolski K, Dodge P. Impact of in utero tobacco exposure on fetal growth: Amount of exposure and second trimester fetal growth measurements. Neurotoxicol Teratol 2024; 102:107334. [PMID: 38360154 DOI: 10.1016/j.ntt.2024.107334] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 11/15/2023] [Accepted: 02/09/2024] [Indexed: 02/17/2024]
Abstract
BACKGROUND Research reveals small and inconsistent findings linking prenatal tobacco exposure and early fetal growth, but failure to consider confounding and amount of exposure many explain inconsistencies. GOAL To examine whether fetal growth effects following exposure to tobacco are evident in the second trimester, specific to certain growth parameters, and dose dependent. METHODS Participants were pregnant women (64 smokers, 100 controls) with no other drug use. Available data included background/medical information and ultrasound measurements coded as percentiles. RESULTS Controlling for background differences, 10+ cig/day predicted a 10+ percentile point reduction in estimated fetal weight, femur length, head circumference, and biparietal diameter compared to non-exposed controls. Exposure to <10 cig/day predicted significant reduction in only biparietal diameter. Exposure was unrelated to abdominal circumference. CONCLUSIONS Results demonstrate utility of considering amount of exposure when examining/quantifying fetal growth effects, and suggest even reduction in early pregnancy smoking may positively benefit aspects of fetal development.
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Podlasek A, Claire R, Campbell KA, Orton S, Thomson R, Coleman T. Systematic review and meta-analysis investigating nicotine, cotinine and carbon monoxide exposures in people who both smoke and use nicotine replacement therapy. Addiction 2023; 118:2076-2092. [PMID: 37394704 DOI: 10.1111/add.16279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 05/16/2023] [Indexed: 07/04/2023]
Abstract
AIMS To determine effects of concurrent smoking and nicotine replacement therapy (NRT) use on reported heaviness of smoking, nicotine (cotinine) body fluid and exhaled air carbon monoxide (CO) concentrations. METHODS Systematic review and meta-analysis of RCTs, which test interventions permitting concurrent NRT use and smoking and comparing, within participants, outcomes when smoking with those when smoking and using NRT concurrently. Measurements included reported number of cigarettes smoked per day (CPD), body fluid cotinine and expired air CO concentrations. RESULTS Twenty-nine studies were included in the review. Meta-analysis of nine showed that, compared with when solely smoking, fewer cigarettes were smoked daily when NRT was used (mean difference during concurrent smoking and NRT use, -2.06 CPD [95% CI = -3.06 to -1.07, P < 0.0001]). Meta-analysis of seven studies revealed a non-significant reduction in exhaled CO during concurrent smoking and NRT use (mean difference, -0.58 ppm [95% CI = -2.18 to 1.03, P = 0.48]), but in the three studies that tested NRT used in the lead-up to quitting (i.e. as preloading), a similar reduction in exhaled CO was statistically significant (mean difference, -2.54 ppm CO [95% CI = -4.14 to -0.95, P = 0.002]). Eleven studies reported cotinine concentrations, but meta-analysis was not possible because of data reporting heterogeneity; of these, seven reported lower cotinine concentrations with concurrent NRT use and smoking, four reported no differences, and none reported higher concentrations. CONCLUSIONS People who smoke and also use nicotine replacement therapy report smoking less heavily than people who solely smoke. When nicotine replacement therapy is used in the lead-up to quitting (preloading), this reported smoking reduction has been biochemically confirmed. There is no evidence that concurrent smoking and nicotine replacement therapy use result in greater nicotine exposure than solely smoking.
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Affiliation(s)
- Anna Podlasek
- Centre for Academic Primary Care, University of Nottingham, Nottingham, Nottinghamshire, UK
- Tayside Innovation and MedTech Ecosystem (TIME), University of Dundee, Dundee, Scotland, UK
| | - Ravinder Claire
- National Institute for Health and Care Excellence, London, London City, UK
| | - Katarzyna A Campbell
- Centre for Academic Primary Care, University of Nottingham, Nottingham, Nottinghamshire, UK
| | - Sophie Orton
- Centre for Academic Primary Care, University of Nottingham, Nottingham, Nottinghamshire, UK
| | - Ross Thomson
- Centre for Academic Primary Care, University of Nottingham, Nottingham, Nottinghamshire, UK
| | - Tim Coleman
- Centre for Academic Primary Care, University of Nottingham, Nottingham, Nottinghamshire, UK
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Xie S, Monteiro K, Gjelsvik A. The association between adverse birth outcomes and smoking cessation during pregnancy across the United States-43 States and New York City, 2012-2017. Arch Gynecol Obstet 2023; 308:1207-1215. [PMID: 36175683 DOI: 10.1007/s00404-022-06792-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Accepted: 09/09/2022] [Indexed: 11/02/2022]
Abstract
PURPOSE This cross-sectional study aimed to estimate the risks of adverse birth outcomes among pregnant smokers and the benefits of smoking cessation during pregnancy on birth outcomes across the United States. METHODS We performed an analysis of 203,437 pregnant women using data collected by the Pregnancy Risk Assessment Monitoring System (PRAMS) from 2012 to 2017. PRAMS uses questionnaires and birth certificates to collect information about the socio-demographic characteristics of pregnant women, smoking status before and during pregnancy, and birth outcomes. We assessed the relationship between self-reported smoking status during pregnancy and preterm birth, low birth weight, and small-for-gestational-age using multivariable logistic regression models. RESULTS In our study population, 80.43% of pregnant women never smoked, 10.55% of pregnant women quit smoking during pregnancy, and 9.02% continued smoking during pregnancy. Puerto Rico had the highest prevalence of non-smokers (94.12%), while West Virginia had the lowest prevalence of non-smokers (60.54%). Pregnant women who had a higher education level, were married, had less than 5 types of stress, and had government or private insurance before pregnancy had a higher prevalence of smokers who quit during pregnancy (quit smokers) than those that continued smoking (continuous smokers). Compared to non-smokers, continuous smokers had a significantly higher risk of low birth weight (AOR: 1.91, 95% CI 1.80, 2.03), preterm birth (AOR: 1.31, 95% CI 1.21, 1.41), and small-for-gestational-age (AOR: 2.22, 95% CI 2.07, 2.39). However, the relationships between quitting smoking and preterm birth and small-for-gestational-age were not significant. CONCLUSION Our models suggest that smoking cessation during pregnancy can prevent adverse birth outcomes by significantly reducing the risk of preterm birth and small-for-gestational-age to almost comparable to not smoking.
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Affiliation(s)
- Shuai Xie
- School of Public Health, Brown University, Providence, Rhode Island, USA.
| | - Karine Monteiro
- Rhode Island Department of Health, Providence, Rhode Island, USA
| | - Annie Gjelsvik
- School of Public Health, Brown University, Providence, Rhode Island, USA
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Bonello K, Figoni H, Blanchard E, Vignier N, Avenin G, Melchior M, Cadwallader JS, Chastang J, Ibanez G. Prevalence of smoking during pregnancy and associated social inequalities in developed countries over the 1995-2020 period: A systematic review. Paediatr Perinat Epidemiol 2023; 37:555-565. [PMID: 37427978 DOI: 10.1111/ppe.12989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Revised: 05/04/2023] [Accepted: 05/08/2023] [Indexed: 07/11/2023]
Abstract
BACKGROUND Smoking during pregnancy (SDP) is an important source of preventable morbidity and mortality for both mother and child. OBJECTIVES The aim of this study was to describe changes in the prevalence of SDP over the last 25 years in developed countries (Human Development Index >0.8 in 2020) and associated social inequalities. DATA SOURCES A systematic review was conducted based on a search in PubMed, Embase and PsycInfo databases and government sources. STUDY SELECTION AND DATA EXTRACTION Published studies between January 1995 and March 2020, for which the primary outcome was to assess the national prevalence of SDP and the secondary outcome was to describe related socio-economic data were included in the analysis. The selected articles had to be written in English, Spanish, French or Italian. SYNTHESIS The articles were selected after successive reading of the titles, abstracts and full-length text. An independent double reading with intervention of a third reader in case of disagreement allowed including 35 articles from 14 countries in the analysis. RESULTS The prevalence of SDP differed across the countries studied despite comparable levels of development. After 2015, the prevalence of SDP ranged between 4.2% in Sweden and 16.6% in France. It was associated with socio-economic factors. The prevalence of SDP slowly decreased over time, but this overall trend masked inequalities within populations. In Canada, France and the United States, the prevalence decreased more rapidly in women of higher socio-economic status, and inequalities in maternal smoking were more marked in these countries. In the other countries, inequalities tended to decrease but remained significant. CONCLUSIONS During pregnancy, that is a period described as a window of opportunity, smoking and social vulnerability factors need to be detected to implement targeted prevention strategies aiming at reducing related social inequalities.
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Affiliation(s)
- Kim Bonello
- Department of General Practice, School of Medicine, Sorbonne Université, Paris, France
| | - Hugo Figoni
- Department of General Practice, School of Medicine, Sorbonne Université, Paris, France
| | - Estelle Blanchard
- Department of General Practice, School of Medicine, Sorbonne Université, Paris, France
| | - Nicolas Vignier
- INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique, Sorbonne Université, Paris, France
| | - Guillaume Avenin
- Department of General Practice, School of Medicine, Sorbonne Université, Paris, France
| | - Maria Melchior
- INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique, Sorbonne Université, Paris, France
| | - Jean-Sébastien Cadwallader
- Department of General Practice, School of Medicine, Sorbonne Université, Paris, France
- INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique, Sorbonne Université, Paris, France
| | - Julie Chastang
- Department of General Practice, School of Medicine, Sorbonne Université, Paris, France
- INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique, Sorbonne Université, Paris, France
| | - Gladys Ibanez
- Department of General Practice, School of Medicine, Sorbonne Université, Paris, France
- INSERM, Institut Pierre Louis d'Epidémiologie et de Santé Publique, Sorbonne Université, Paris, France
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van Roekel M, Henrichs J, Franx A, Verhoeven CJ, de Jonge A. Implication of third-trimester screening accuracy for small-for-gestational age and additive value of third-trimester growth-trajectory indicators in predicting severe adverse perinatal outcome in low-risk population: pragmatic secondary analysis of IRIS study. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2023; 62:209-218. [PMID: 36704993 DOI: 10.1002/uog.26167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 11/23/2022] [Accepted: 12/30/2022] [Indexed: 06/18/2023]
Abstract
OBJECTIVES To examine the implications of third-trimester small-for-gestational-age (SGA) screening accuracy on severe adverse perinatal outcome (SAPO) and obstetric intervention in a low-risk population. Furthermore, we aimed to explore the additive value of third-trimester sonographic growth-trajectory measurements in predicting SAPO and obstetric intervention. METHODS This was a secondary analysis of a Dutch national multicenter stepped-wedge-cluster randomized trial among 11 820 low-risk pregnant women. Using multilevel multivariable logistic regression analysis, we compared SAPO and obstetric interventions in SGA neonates with and without SGA suspected prenatally (true positives and false negatives) and non-SGA neonates with and without SGA suspected prenatally (false positives and true negatives). In a subsample (n = 7989), we analyzed the associations of abdominal circumference (AC) and estimated fetal weight (EFW) < 10th centile (p10) and third-trimester growth-trajectory indicators AC and EFW crossing > 20 and AC crossing > 50 centiles and the lowest decile of AC growth-velocity Z-scores (ACGV < 10%) with SAPO and obstetric interventions. RESULTS SGA infants, i.e. the true-positive and false-negative cases, had an increased risk of SAPO (adjusted odds ratio (aOR), 4.46 (95% CI, 2.28-8.75) and aOR 2.61 (95% CI, 1.74-3.89), respectively), and obstetric intervention (aOR for: induction of labor, 2.99 (95% CI, 2.15-4.17) and 1.38 (95% CI, 1.14-1.66); Cesarean section, 1.82 (95% CI, 1.25-2.66) and 1.27 (95% CI, 1.05-1.54); medically indicated preterm delivery, 2.67 (95% CI, 1.97-3.62) and 1.20 (95% CI, 1.03-1.40)). The false-positive cases did not differ from the true negatives for all outcomes, including obstetric intervention. Of the third-trimester growth-trajectory indicators, only ACGV < 10% was associated moderately with SAPO (aOR, 2.15 (95% CI, 1.17-3.97)), while AC and EFW crossing > 20 and AC crossing > 50 centiles were not. Both EFW < p10 alone (aOR, 1.95 (95% CI, 1.13-3.38)) and EFW < p10 combined with ACGV < 10% (aOR, 4.69 (95% CI, 1.99-11.07)) were associated with SAPO, and they performed equally well in predicting SAPO (area under the receiver-operating-characteristics curve, 0.71 (95% CI, 0.65-0.76) vs 0.72 (95% CI, 0.67-0.77), P = 0.51). CONCLUSION Neonates who had been suspected falsely of being SGA during pregnancy had no higher rates of obstetric intervention than did those without suspicion of SGA prenatally. Our results do not support that third-trimester low fetal growth velocity (ACGV < 10%) may be of additive value for the identification of fetuses at risk of SAPO in populations remaining at low risk throughout pregnancy. AC and EFW crossing > 20 and AC crossing > 50 centiles performed poorly in identifying abnormal fetal growth. © 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)
- M van Roekel
- Amsterdam UMC, location Vrije Universiteit, Department of Midwifery Science/AVAG, Amsterdam Reproduction & Development Research Institute, Amsterdam, The Netherlands
| | - J Henrichs
- Amsterdam UMC, location Vrije Universiteit, Department of Midwifery Science/AVAG, Amsterdam Reproduction & Development Research Institute, Amsterdam, The Netherlands
| | - A Franx
- Department of Obstetrics and Gynaecology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - C J Verhoeven
- Amsterdam UMC, location Vrije Universiteit, Department of Midwifery Science/AVAG, Amsterdam Reproduction & Development Research Institute, Amsterdam, The Netherlands
- Department of Midwifery, University of Nottingham, Nottingham, UK
| | - A de Jonge
- Amsterdam UMC, location Vrije Universiteit, Department of Midwifery Science/AVAG, Amsterdam Reproduction & Development Research Institute, Amsterdam, The Netherlands
- Amsterdam UMC, location Vrije Universiteit, Department of Midwifery Science/AVAG, Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
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Identification of the Obstetric Factors Increasing Tendency to Smoking Cessation During Pregnancy. J Addict Nurs 2023; 34:E28-E38. [PMID: 34519688 DOI: 10.1097/jan.0000000000000424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
INTRODUCTION Cigarette, one of the various forms of tobacco, is the most commonly used tobacco product in Turkey and in the world. Cigarette has several negative effects on general health and is a major problem in the pregnancy period. This study aims to identify pregnancy-related factors that affect the tendency to smoking cessation and their effect levels in pregnant women who continue to smoke during pregnancy. METHOD The sample of this descriptive and cross-sectional study was 430 pregnant women who smoked. Data were collected through an original interview form and face-to-face interviews. Data analysis was performed using chi-square, independent t test, and multiple logistic regression model in terms of demographic, obstetric, maternal, and fetal features. RESULTS The average number of cigarettes smoked before pregnancy was 13.28 ± 8.62, whereas the average number of cigarettes smoked during pregnancy was 6.60 ± 7.64. The tendency to decrease smoking increases 2.8 times ( OR = 2.825, 95% CI [1.631, 4.895]) with the number of pregnancies and approximately 2 times in case of a planned pregnancy ( OR = 1.946, 95% CI [1.076, 3.520]). The frequency of having prenatal visits showed a weak but significant relationship with the number of abortuses and the number of living children. CONCLUSIONS Developing a risk map in line with the findings of the study and considering the obstetric features of smoking women could enable to hypothesize about the types of behaviors in smoking in the following processes of pregnancy. With the precautions to be taken, the negative effects of smoking on maternal and fetal health could be prevented or minimized.
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Timing of Maternal Smoking Cessation and Newborn Weight, Height, and Head Circumference. Obstet Gynecol 2023; 141:119-125. [PMID: 36701612 DOI: 10.1097/aog.0000000000004991] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 08/18/2022] [Indexed: 12/23/2022]
Abstract
OBJECTIVE To examine the relationship between timing of smoking cessation during pregnancy and anthropometric indices of newborns. METHODS Mothers and neonates enrolled in the JECS (Japan Environment and Children's Study), a nationwide birth cohort study, were examined. Patients with full-term neonates were included in the analysis, and 73,025 mother-neonate pairs with complete data were identified. The mothers were classified into six groups according to smoking status during pregnancy (nonsmokers [Q1, n=44,198]; ex-smokers who quit before pregnancy [Q2, n=16,461]; ex-smokers who quit in the first trimester [Q3, n=8,948]; ex-smokers who quit in the second trimester [Q4, n=498]; ex-smokers who quit in the third trimester [Q5, n=651]; and smokers who smoked throughout pregnancy [Q6, n=2,269)]). Data on smoking were based on questionnaires administered in the first, second, or third trimester and 1 month after delivery. The primary outcomes were birth weight, height, and head circumference. RESULTS Compared with nonsmokers (Q1), no adverse outcomes were observed for ex-smokers who quit before pregnancy (Q2). The mean adjusted weights of male and female neonates were 135 g and 125 g lower, respectively, in Q6 participants than in Q1 participants. Comparing Q1 and Q6 participants, height was 0.6 cm and 0.7 cm smaller for male and female neonates, respectively. Head circumference in neonates of Q6 participants was 0.3 cm and 0.3 cm smaller for male and female neonates, respectively, than that in Q1 participants. Across all three measures, smoking cessation in the first and second trimester reduced the differential in outcomes between nonsmokers and individuals who smoked throughout pregnancy. CONCLUSION Smoking during pregnancy is associated with reduced newborn birth weight, height, and head circumference. Earlier smoking cessation during pregnancy reduces the adverse effects of smoking on fetal growth.
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Barros H, Baia I, Monjardino T, Pimenta P, Alfredo A, Sorokina A, Domingues R. Fast-track referral for health interventions during pregnancy: study protocol of a randomised pragmatic experimental study to reduce low birth weight in Portugal (STOP LBW). BMJ Open 2022; 12:e052964. [PMID: 35292492 PMCID: PMC8928251 DOI: 10.1136/bmjopen-2021-052964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
INTRODUCTION Low birth weight (LBW) is associated with a wide range of short-term and long-term consequences and is related to maternal psychosocial and behavioural determinants. The objective of this study is to estimate the effect of implementing fast-track referral for early intervention on psychosocial and behavioural risk factors-smoking, alcohol consumption, depression and physical violence-in reducing the incidence of LBW. METHODS AND ANALYSIS Parallel superiority pragmatic clinical trial randomised by clusters. Primary healthcare units (PHCU) located in Portugal will be randomised (1:1) to intervention or control groups. Pregnant women over 18 years of age attending these PHCU will be eligible to the study. Risk factors will be assessed through face-to-face interviews. In the intervention group, women who report at least one risk factor will have immediate access to referral services. The comparison group will be the local standard of care for these risk factors. We will use intention-to-treat analyses to compare intervention and control groups. We estimated a sample size of 2832 pregnant women to detect a 30% reduction in the incidence rate of LBW between the control and intervention groups. Secondary outcomes are the reduction of preterm births, reduction of the four risk factors and acceptance of the intervention. ETHICS AND DISSEMINATION The study was approved by the Ethics Committee of the Public Health Institute of the University of Porto (no CE20140). The findings will be disseminated to the public, the funders, health professionals, health managers and other researchers. TRIAL REGISTRATION NUMBER NCT04866277.
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Affiliation(s)
- Henrique Barros
- Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto, Porto, Portugal
| | - Ines Baia
- Instituto de Saúde Pública da Universidade do Porto, Universidade do Porto, Porto, Portugal
| | - Teresa Monjardino
- Instituto de Saúde Pública da Universidade do Porto, Universidade do Porto, Porto, Portugal
| | - Pedro Pimenta
- Instituto de Saúde Pública da Universidade do Porto, Universidade do Porto, Porto, Portugal
| | - Ana Alfredo
- Instituto de Saúde Pública da Universidade do Porto, Universidade do Porto, Porto, Portugal
| | - Anzhela Sorokina
- Instituto de Saúde Pública da Universidade do Porto, Universidade do Porto, Porto, Portugal
| | - Rosa Domingues
- Laboratório de Pesquisa Clínica em DST/Aids, Instituto Nacional de Infectologia Evandro Chagas, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
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Di HK, Gan Y, Lu K, Wang C, Zhu Y, Meng X, Xia WQ, Xu MZ, Feng J, Tian QF, He Y, Nie ZQ, Liu JA, Song FJ, Lu ZX. Maternal smoking status during pregnancy and low birth weight in offspring: systematic review and meta-analysis of 55 cohort studies published from 1986 to 2020. World J Pediatr 2022; 18:176-185. [PMID: 35089538 DOI: 10.1007/s12519-021-00501-5] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 12/08/2021] [Indexed: 12/30/2022]
Abstract
BACKGROUND Maternal smoking during pregnancy may be associated with low birth weight (LBW) in offspring and global risk estimates have not been summarized previously. We aimed to systematically explore evidence regarding maternal smoking and the LBW risk in offspring globally and examine possible causes of heterogeneity across relevant studies. METHODS Comprehensive search of PubMed, Ovid Embase, Ovid Medline (R), and Web of science from inception until October 2021 was carried out. A random-effects meta-analysis was used to estimate the pooled odds ratio (OR) and corresponding 95% confidence interval (CI). Restricted cubic spline analysis with three knots was used to further examine the dose-response relationship. RESULTS Literature searches yielded 4940 articles, of which 53 met inclusion criteria (comprising 55 independent studies). Maternal smoking during pregnancy was significantly associated with the risk of LBW in offspring (OR = 1.89, 95% CI = 1.80-1.98). Furthermore, an obvious dose-response relationship between the amount of cigarettes daily smoked in pregnancy and the risk of LBW in offspring was observed. The results of subgroup analyses indicated that the risk of maternal smoking on LBW was larger in more recently conducted studies (P = 0.020) and longer period of active smoking during pregnancy (P = 0.002). No evidence of publication bias was found. CONCLUSIONS In summary, maternal smoking in pregnancy was significantly associated with a higher risk of LBW in offspring on a global scale. The risk of maternal smoking on infant LBW seems to be increasing over time, and was higher with longer smoking duration throughout pregnancy and more cigarettes smoked daily.
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Affiliation(s)
- Hong-Kun Di
- Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - Yong Gan
- Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - Kai Lu
- Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Chao Wang
- Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - Yi Zhu
- Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - Xin Meng
- Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - Wen-Qi Xia
- Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - Min-Zhi Xu
- Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - Jing Feng
- Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - Qing-Feng Tian
- School of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Yan He
- School of Public Health, Zhengzhou University, Zhengzhou, Henan, China
| | - Zhi-Qiang Nie
- Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - Jun-An Liu
- Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan, 430030, Hubei, China
| | - Fu-Jian Song
- Norwich Medical School, Faculty of Medicine and Health Science, University of East Anglia, Norwich, NR47TJ, UK.
| | - Zu-Xun Lu
- Department of Social Medicine and Health Management, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, No. 13 Hangkong Road, Wuhan, 430030, Hubei, China.
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Stacey T, Samples J, Leadley C, Akester L, Jenney A. 'I don't need you to criticise me, I need you to support me'. A qualitative study of women's experiences of and attitudes to smoking cessation during pregnancy. Women Birth 2022; 35:e549-e555. [PMID: 35115246 DOI: 10.1016/j.wombi.2022.01.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/26/2022] [Accepted: 01/26/2022] [Indexed: 01/17/2023]
Abstract
BACKGROUND Smoking is associated with health inequalities and is the most important modifiable risk factor for poor outcome in pregnancy. AIM To explore women's experiences of smoking during pregnancy, examine their attitudes and barriers to smoking cessation, and to discover what support they feel might enable them to have a smoke-free pregnancy in future. METHODS A qualitative study was conducted with nineteen women in the United Kingdom who had smoked at some stage in pregnancy during the last five years. Data were collected through in-depth telephone interviews between June and August 2021. The interviews were audio-recorded, transcribed verbatim, and thematically analysed. FINDINGS Four key themes were identified: the complex relationship with smoking, being ready to quit, the need for support and understanding, and ideas to support a smoke free pregnancy. The findings revealed that there were two distinct avenues for enabling the support process: encouraging a readiness to quit through identifying individual context, personalised support, and educational risk perception, and, supporting the process of quitting, and offering a range of options, underpinned by a personalised, non-judgemental approach. CONCLUSION Smoking in pregnancy is a complex issue resulting from a combination of social, emotional, and physical factors. The findings from this study suggest that a combination of approaches should be made available to enable pregnant women who smoke to select the best options for their individual needs. Irrespective of the practical support offered, there is a need for informed, sensitive, individualised support system that women can identify with.
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Affiliation(s)
- Tomasina Stacey
- King's College London, Florence Nightingale Faculty of Nursing Midwifery and Palliative Care, UK.
| | - Jayne Samples
- University of Huddersfield, School of Health and Human Science, UK
| | - Chelsea Leadley
- University of Huddersfield, School of Health and Human Science, UK
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Massey SH, Allen NB, Pool LR, Miller ES, Pouppirt NR, Barch DM, Luby J, Perlman SB, Rogers CE, Smyser CD, Wakschlag LS. Impact of prenatal exposure characterization on early risk detection: Methodologic insights for the HEALthy Brain and Child Development (HBCD) study. Neurotoxicol Teratol 2021; 88:107035. [PMID: 34606910 PMCID: PMC8578417 DOI: 10.1016/j.ntt.2021.107035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 09/27/2021] [Accepted: 09/28/2021] [Indexed: 12/14/2022]
Abstract
BACKGROUND A major challenge in prenatal drug exposure research concerns the balance of measurement quality with sample sizes necessary to address confounders. To inform the selection of optimal exposure measures for the HEALthy Brain and Child Development (HBCD) Study, we employed integrated analysis to determine how different methods used to characterize prenatal tobacco exposure influence the detection of exposure-related risk, as reflected in normal variations in birth weight. METHODS Participants were N = 2323 mother-infant dyads derived from 7 independent developmental cohorts harmonized on measures of exposure, outcome (birthweight), and covariates. We compared estimates of PTE-related effects on birthweight derived from linear regression models when PTE was categorized dichotomously based on any fetal exposure (30% exposed; 69% not exposed); versus categorically, based on common patterns of maternal smoking during pregnancy (never smoked 69%; quit smoking 16%; smoked intermittently 2%; smoked persistently 13%). We secondarily explored sex differences in PTE-birthweight associations across these categorization methods. RESULTS When PTE was categorized dichotomously, exposure was associated with a - 125-g difference in birthweight (95% C.I. -173.7 - -76.6, p < .0001). When PTE was characterized categorically based on maternal smoking patterns, however, exposure was associated with either no difference in birthweight if mothers quit smoking by the end of the first trimester (B = -30.6, 95% C.I. -88.7-27.4, p = .30); or a - 221.8 g difference in birthweight if mothers did not [95% C.I. (-161.7 to -282.0); p < .001]. Qualitative sex differences were also detected though PTE x sex interactions did not reach statistical significance. Maternal smoking cessation during pregnancy was associated with a 239.3 g increase in birthweight for male infants, and a 114.0 g increase in birthweight for females infants (p = .07). CONCLUSIONS Categorization of PTE based on patterns of maternal smoking rather than the presence or absence of exposure alone revealed striking nuances in estimates of exposure-related risk. The described method that captures both between-individual and within-individual variability in prenatal drug exposure is optimal and recommended for future developmental investigations such as the HBCD Study.
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Affiliation(s)
- Suena H Massey
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, 676 North Saint Clair Street, Suite 1000, Chicago, IL 60611, USA; Department of Medical Social Sciences, Northwestern University Feinberg School of Medicine, 625 N Michigan Avenue, Suite 2100, Chicago, IL 60611, USA; Institute for Innovations in Developmental Sciences, Northwestern University Feinberg School of Medicine, 633 North Saint Clair Street, 19(th) floor, Chicago, IL 60611, USA.
| | - Norrina B Allen
- Institute for Innovations in Developmental Sciences, Northwestern University Feinberg School of Medicine, 633 North Saint Clair Street, 19(th) floor, Chicago, IL 60611, USA; Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, 680 North Lakeshore Drive, Suite 1400, Chicago, IL 60611, USA.
| | - Lindsay R Pool
- Institute for Innovations in Developmental Sciences, Northwestern University Feinberg School of Medicine, 633 North Saint Clair Street, 19(th) floor, Chicago, IL 60611, USA; Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, 680 North Lakeshore Drive, Suite 1400, Chicago, IL 60611, USA.
| | - Emily S Miller
- Institute for Innovations in Developmental Sciences, Northwestern University Feinberg School of Medicine, 633 North Saint Clair Street, 19(th) floor, Chicago, IL 60611, USA; Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, 250 East Superior Street, Room 05-2175, Chicago, IL 60611, USA.
| | - Nicole R Pouppirt
- Institute for Innovations in Developmental Sciences, Northwestern University Feinberg School of Medicine, 633 North Saint Clair Street, 19(th) floor, Chicago, IL 60611, USA; Department of Pediatrics, Division of Neonatology, Ann & Robert H. Lurie Children's Hospital of Chicago, 225 East Chicago Avenue, Box 45, Chicago, IL 60611, USA.
| | - Deanna M Barch
- Department of Psychological & Brain Sciences, Washington University, Box 1125, One Brookings Drive, St. Louis, MO 63130, USA.
| | - Joan Luby
- Department of Psychiatry, Washington University School of Medicine in St. Louis, 660 S. Euclid Box 8511, St. Louis, MO 63110, USA.
| | - Susan B Perlman
- Department of Child and Adolescent Psychiatry, Washington University School of Medicine in St. Louis, 4444 Forest Park Ave, St. Louis, MO 63110, United States of America.
| | - Cynthia E Rogers
- Department of Psychiatry, Washington University School of Medicine in St. Louis, 660 S. Euclid Box 8511, St. Louis, MO 63110, USA.
| | - Chris D Smyser
- Departments of Neurology, Pediatrics, and Radiology, Washington University School of Medicine in St. Louis, 4525 Scott Avenue, St. Louis, MO 63110, USA.
| | - Lauren S Wakschlag
- Department of Medical Social Sciences, Northwestern University Feinberg School of Medicine, 625 N Michigan Avenue, Suite 2100, Chicago, IL 60611, USA; Institute for Innovations in Developmental Sciences, Northwestern University Feinberg School of Medicine, 633 North Saint Clair Street, 19(th) floor, Chicago, IL 60611, USA.
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12
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Osborne JB, Bailey BA. Does it matter when I quit? Could I just cut down some? Links between trimester-specific smoking amount, preterm birth, and low birth weight. Birth Defects Res 2021; 114:5-12. [PMID: 34585853 DOI: 10.1002/bdr2.1958] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 09/12/2021] [Accepted: 09/16/2021] [Indexed: 11/07/2022]
Abstract
BACKGROUND Substantial evidence demonstrates the harms of pregnancy smoking. Due to the need for very large data sets, less data exist to inform decisions about when quitting should occur, or whether a certain amount of reduction is beneficial. OBJECTIVES Our goal was to examine the effect of timing and amount of pregnancy smoking on low birth weight (LBW) and preterm birth (PTB). METHODS Data for 3 years of registered births in Tennessee were available and included standard birth certificate information. RESULTS Of 241,616 women, 15.7% smoked at conception, and those who quit as early as the first trimester had significantly increased adjusted odds of LBW (27%) and PTB (14%) compared to nonsmokers, with this effect largely driven by smoking 10+ cigarettes per day. Smoking into the second trimester but quitting prior to the third also predicted increases in LBW and PTB compared to both not smoking at all and smoking only in the first trimester. Smoking to delivery predicted a 2.8-fold increased likelihood of LBW, and a 2.1-fold increased rate of PTB. Any level of smoking after the first trimester substantially increased the odds of poor outcomes compared to both nonsmoking and smoking only in the first trimester. CONCLUSIONS Findings suggest that to avoid LBW or PTB, pregnant smokers should be advised that quitting completely by the end of the first trimester is important, and that continuing to smoke even <5 cigarettes per day after that point substantially increases the potential for of adverse outcomes.
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Affiliation(s)
- Jahla B Osborne
- Department of Psychology, University of Michigan, Ann Arbor, Michigan, USA
| | - Beth A Bailey
- Central Michigan University College of Medicine, Mt Pleasant, Michigan, USA
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Vale CCR, Almeida NKDO, Almeida RMVRD. On the use of the E-value for sensitivity analysis in epidemiologic studies. CAD SAUDE PUBLICA 2021; 37:e00294720. [PMID: 34190835 DOI: 10.1590/0102-311x00294720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 02/06/2021] [Indexed: 11/21/2022] Open
Abstract
This study illustrates the use of a recently developed sensitivity index, the E-value, helpful in strengthening causal inferences in observational epidemiological studies. The E-value aims to determine the minimum required strength of association between an unmeasured confounder and an exposure/outcome to explain the observed association as non-causal. Such parameter is defined as E - v a l u e = R R + R R R R - 1 , where RR is the risk ratio between the exposure and the outcome. Our work illustrates the E-value using observational data from a recently published study on the relationship between indicators of prenatal care adequacy and the outcome low birthweight. The E-value ranged between 1.45 and 5.63 according to the category and prenatal care index evaluated, showing the highest value for the "no prenatal care" category of the GINDEX index and the minimum value for "intermediate prenatal care" of the APNCU index. For "inappropriate prenatal care" (all indexes), the E-value ranged between 2.76 (GINDEX) and 4.99 (APNCU). These findings indicate that only strong confounder/low birthweight associations (more than 400% increased risk) would be able to fully explain the prenatal care vs. low birthweight association observed. The E-value is a useful, intuitive sensitivity analysis tool that may help strengthening causal inferences in epidemiological observational studies.
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Affiliation(s)
- Conceição Christina Rigo Vale
- Instituto Alberto Luiz Coimbra de Pós-graduação e Pesquisa de Engenharia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil
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Blue NR, Page JM, Silver RM. Recurrence Risk of Fetal Growth Restriction: Management of Subsequent Pregnancies. Obstet Gynecol Clin North Am 2021; 48:419-436. [PMID: 33972075 DOI: 10.1016/j.ogc.2021.03.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Fetal growth restriction (FGR) is a common obstetric complication that predisposes to mortality across the lifespan. Women with a prior pregnancy affected by FGR have a 20% to 30% risk of recurrence, but effective preventive strategies are lacking. Pharmacologic interventions to prevent FGR are lacking. Low-dose aspirin may be somewhat effective, but low-molecular-weight heparin and sildenafil are not. Surveillance in a subsequent pregnancy may consist of serial ultrasonography with timing and frequency determined by the clinical severity in the index pregnancy. Once FGR is diagnosed, the principal management strategy consists of close surveillance and carefully timed delivery.
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Affiliation(s)
- Nathan R Blue
- Maternal-Fetal Medicine, University of Utah Health, Intermountain Healthcare, 30 North 1900 East, 2A200, Salt Lake City, UT 84132, USA.
| | - Jessica M Page
- Maternal-Fetal Medicine, Intermountain Healthcare, University of Utah Health, 5121 South Cottonwood Street, Suite 100, Murray, UT 84107, USA. https://twitter.com/jess_m_page
| | - Robert M Silver
- Maternal-Fetal Medicine, University of Utah Health, 30 North 1900 East, 2A200, Salt Lake City, UT 84132, USA
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Interpregnancy Care: An Opportunity to Improve Women's Health and Reduce the Risk of Maternal Morbidity and Mortality. JOURNAL OF PUBLIC HEALTH MANAGEMENT AND PRACTICE 2021; 27:S155-S158. [PMID: 33785688 DOI: 10.1097/phh.0000000000001319] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Interpregnancy care is the health care provided to a woman during the postpartum and preconception periods between pregnancies. Half of maternal deaths occur postpartum and cardiometabolic complications of pregnancy increase the risk for maternal morbidity and mortality and development of chronic conditions. By improving women's health between and beyond pregnancies, interpregnancy care has the potential to improve pregnancy outcomes and women's long-term health. This practice brief report summarizes evidence regarding the impact of interpregnancy care on pregnancy and long-term health outcomes for women with hypertension, diabetes, substance use, and mental health disorders. Existing evidence is limited but demonstrates that the utilization of interventions during this period may result in improved health outcomes. Additional research efforts are needed to better understand the impact of interpregnancy care on women's health throughout the life course.
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Perak AM, Lancki N, Kuang A, Labarthe DR, Allen NB, Shah SH, Lowe LP, Grobman WA, Scholtens DM, Lloyd-Jones DM, Lowe WL. Associations of gestational cardiovascular health with pregnancy outcomes: the Hyperglycemia and Adverse Pregnancy Outcome study. Am J Obstet Gynecol 2021; 224:210.e1-210.e17. [PMID: 32768430 DOI: 10.1016/j.ajog.2020.07.053] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 07/06/2020] [Accepted: 07/29/2020] [Indexed: 01/22/2023]
Abstract
BACKGROUND The American Heart Association's formal characterization of cardiovascular health combines several metrics in a health-oriented, rather than disease-oriented, framework. Although cardiovascular health assessment during pregnancy has been recommended, its significance for pregnancy outcomes is unknown. OBJECTIVE The purpose of this study was to examine the association of gestational cardiovascular health-formally characterized by a combination of 5 metrics-with adverse maternal and newborn outcomes. STUDY DESIGN We analyzed data from the Hyperglycemia and Adverse Pregnancy Outcome study, including 2304 mother-newborn dyads from 6 countries. Maternal cardiovascular health was defined by the combination of the following 5 metrics measured at a mean of 28 (24-32) weeks' gestation: body mass index, blood pressure, lipids, glucose, and smoking. Levels of each metric were categorized using pregnancy guidelines, and the total cardiovascular health was scored (0-10 points, where 10 was the most favorable). Cord blood was collected at delivery, newborn anthropometrics were measured within 72 hours, and medical records were abstracted for obstetrical outcomes. Modified Poisson and multinomial logistic regression were used to test the associations of gestational cardiovascular health with pregnancy outcomes, adjusted for center and maternal and newborn characteristics. RESULTS The average age of women at study exam was 29.6 years old, and they delivered at a mean gestational age of 39.8 weeks. The mean total gestational cardiovascular health score was 8.6 (of 10); 36.3% had all ideal metrics and 7.5% had 2+ poor metrics. In fully adjusted models, each 1 point higher (more favorable) cardiovascular health score was associated with lower risks for preeclampsia (relative risk, 0.67 [95% confidence interval, 0.61-0.73]), unplanned primary cesarean delivery (0.88 [0.82-0.95]), newborn birthweight >90th percentile (0.81 [0.75-0.87]), sum of skinfolds >90th percentile (0.84 [0.77-0.92]), and insulin sensitivity <10th percentile (0.83 [0.77-0.90]). Cardiovascular health categories demonstrated graded associations with outcomes; for example, relative risks (95% confidence intervals) for preeclampsia were 3.13 (1.39-7.06), 5.34 (2.44-11.70), and 9.30 (3.95-21.86) for women with ≥1 intermediate, 1 poor, or ≥2 poor (vs all ideal) metrics, respectively. CONCLUSION More favorable cardiovascular health at 24 to 32 weeks' gestation was associated with lower risks for several adverse pregnancy outcomes in a multinational cohort.
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The Effects of Different Smoking Patterns in Pregnancy on Perinatal Outcomes in the Southampton Women's Survey. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17217991. [PMID: 33143153 PMCID: PMC7663677 DOI: 10.3390/ijerph17217991] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 10/19/2020] [Accepted: 10/21/2020] [Indexed: 12/20/2022]
Abstract
Maternal smoking during pregnancy has established associations with poor perinatal outcomes. Among continuing pregnant smokers, harm-reduction strategies have been suggested, including temporary cessation of smoking during pregnancy, also known as partial quitting. Support for this strategy, however, remains limited. Six hundred and ninety-seven women in the Southampton Women's Survey who smoked at their last menstrual period were categorised into sustained quitters, partial quitters (quit in either the first or third trimester but not both) or sustained smokers (continued to smoke throughout pregnancy). In regression models, compared with infants born to sustained smokers, infants born to sustained quitters and partial quitters were heavier at birth by β = 0.64 standard deviations (SD) (WHO z-score) (95% CI: 0.47-0.80) and 0.48 SD (WHO z-score) (95% CI: 0.24-0.72) respectively, adjusted for confounders, with similar patterns seen for other anthropometric measures (head circumference and crown-heel length). Sustained quitters had longer gestations by β = 3.5 days (95% CI: 1.8-5.2) compared with sustained smokers, but no difference was seen for partial quitters. While sustained quitting remains the most desired outcome for pregnant smokers, partial quitting should be explored as a strategy to reduce some of the harmful effects of smoking on offspring in those who cannot achieve sustained quitting.
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Smoking and Smoking Cessation in the Risk for Fetal Growth Restriction and Low Birth Weight and Additive Effect of Maternal Obesity. J Clin Med 2020; 9:jcm9113504. [PMID: 33138256 PMCID: PMC7692695 DOI: 10.3390/jcm9113504] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 10/23/2020] [Accepted: 10/26/2020] [Indexed: 12/12/2022] Open
Abstract
Many studies have shown that neonates of smoking mothers have a lower birth weight, but several issues remain poorly studied, e.g., the effects of giving up smoking or the combined effects of smoking and maternal obesity. Therefore, we evaluated a prospective cohort of 912 mothers in a single pregnancy, recruited in Poland, in 2015−2016. In the cohort, we recorded 72 (7.9%) newborns with birth weight <10th percentile, 21 (2.3%) fetal growth restriction (FGR) cases, and 60 (6.6%) low birth weight (LBW, <2500 g) newborns. In the cohort, 168 (18.4%) women smoked before pregnancy; the mean number of cigarettes/day was 10.8 (1–30), and the mean number of years of cigarette smoking was 8.5 (1–25). Among smokers, 57 (6.3%) women smoked in the first trimester. Adjusted odds ratio (AOR) of newborn outcomes (with 95% confidence intervals, CI) was calculated in multi-dimensional logistic regressions. Compared to participants who had never smoked, smoking before pregnancy was associated with a higher odds ratio of birth weight <10th percentile (AOR = 1.93, CI: 1.08–3.44, p = 0.027), but the result for LBW (AOR = 2.76, CI: 1.05–7.26, p = 0.039) and FGR (AOR = 1.13, CI: 0.38–3.36, p = 0.822) had the wider confidence interval or was insignificant. Effects of smoking cessation before pregnancy were statistically insignificant for the studied outcomes. Smoking in the first trimester was associated with a higher risk of birth weight <10th percentile (AOR = 4.68, CI: 2.28–9.62, p < 0.001), LBW (AOR = 6.42, CI: 1.84–22.36, p = 0.004), and FGR (AOR = 3.60, CI: 0.96–13.49, p = 0.057). Smoking cessation in the second/third trimester was associated with a higher odds ratio of birth weight <10th percentile (AOR = 4.54, CI: 1.58–13.02, p = 0.005), FGR (AOR = 3.36, CI: 0.6–18.74, p = 0.167), and LBW (AOR = 2.14, CI: 0.62–7.36), p = 0.229), to a similar degree to smoking in the first trimester. The odds ratios were higher in the subgroup of pre-pregnancy body mass index ≥25 kg/m2 for the risk of birth weight <10th percentile (AOR = 6.39, CI: 2.01–20.34, p = 0.002) and FGR (AOR = 6.25, CI: 0.86–45.59, p = 0.071). The length of cigarette smoking time was also the risk factor for studied outcomes. Conclusions: Smoking in the first trimester increased the studied risks, and the coexistence of excessive maternal weight increased the effects. Smoking cessation during the second/third trimester did not have a protective effect.
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Nematollahi S, Holakouie-Naieni K, Madani A, Shabkhiz H, Torabi E, Lotfi S. The effect of quitting water pipe during pregnancy on anthropometric measurements at birth: a population-based prospective cohort study in the south of Iran. BMC Pregnancy Childbirth 2020; 20:241. [PMID: 32321454 PMCID: PMC7179000 DOI: 10.1186/s12884-020-02948-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 04/14/2020] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Evidence regarding health effects of tobacco cessation during pregnancy is mainly restricted to cigarette while water pipe is the preferred method of tobacco smoking among women in the Middle-East. The present study aimed to assess the effects of cessation of water pipe during pregnancy on birth anthropometric measures in the south of Iran. METHODS Data on 1120 singleton pregnancies (response rate = 93.4%) from a population-based prospective cohort study in suburban communities in Bandar Abbas city was used. Based on water pipe smoking status, the study subjects were categorized into: 1) those who never smoke water pipe (never smoker); 2) those who stopped water pipe during pregnancy and resumed it postpartum (quitters); 3) those who continued smoking water pipe during their pregnancy (always smokers). The Generalized Linear Models (GLMs) were utilized for the analyses. RESULTS Compared to never smokers, quitting water pipe in pregnancy decreased mean birthweight of infants by 99.30 g (β:-99.30, 95%CI:-204.35,-5.75) and an additional decrease of 37.83 g occurred in infants of always smokers (β:-137.13;95%CI:- 262.21,-12.05). Means of birth length did not significantly differ among the three water pipe groups. Means of head circumference, however, significantly increased by 0.79 cm in infants of always smokers (β:079,95%CI:0.13,1.45). CONCLUSION Quitting water pipe during pregnancy had positive effects on infant growth, especially birth weight. Awareness campaigns about health benefits of quitting water pipe during routine prenatal checkups and integration of active follow-up visits into prenatal care protocols for smoking mothers are provided.
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Affiliation(s)
- Shahrzad Nematollahi
- Men's Health and Reproductive Health Research center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Koroush Holakouie-Naieni
- Department of Epidemiology & Biostatistics, School of Public Health, Tehran University of Medical Science, Tehran, Iran
| | - Abdolhossain Madani
- School of Public Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Hossein Shabkhiz
- Bandar Abbas Heath Education & Research Station, School of Public Health, Tehran University of Medical Science, Tehran, Iran
| | - Elham Torabi
- Bandar Abbas Heath Education & Research Station, School of Public Health, Tehran University of Medical Science, Tehran, Iran
| | - Samane Lotfi
- Department of Epidemiology and Public Health, Iran University of Medical Sciences, Tehran, Iran
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