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Leung KL, Lau TW, Chan HW, Chiu KC, Fang CX, Lam YH, Yee KH, Tsang CY. Orthogeriatric co-management model to improve outcome and cost-effectiveness of fragility hip fractures: abridged secondary publication. Hong Kong Med J 2023; 29 Suppl 2:15-17. [PMID: 36950999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2023] Open
Affiliation(s)
- K L Leung
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong SAR, China
| | - T W Lau
- Department of Orthopaedics and Traumatology, Queen Mary Hospital, Hong Kong SAR, China
| | - H W Chan
- Department of Medicine, Queen Mary Hospital, Hong Kong SAR, China
| | - K C Chiu
- Department of Medicine, Queen Mary Hospital, Hong Kong SAR, China
| | - C X Fang
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong SAR, China
| | - Y H Lam
- Physiotherapy Department, Queen Mary Hospital, Hong Kong SAR, China
| | - K H Yee
- Department of Orthopaedics and Traumatology, Alice Ho Miu Ling Nethersole Hospital, Hong Kong SAR, China
| | - C Y Tsang
- Department of Physiotherapy, TWGHs Fung Yiu King Hospital, Hong Kong SAR, China
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Keeney T, Flom M, Ding J, Sy M, Leung K, Kim DH, Orav J, Vogeli C, Ritchie CS. Using a Claims-Based Frailty Index to Investigate Frailty, Survival, and Healthcare Expenditures among Older Adults Hospitalized for COVID-19 at an Academic Medical Center. J Frailty Aging 2023; 12:150-154. [PMID: 36946713 PMCID: PMC9948774 DOI: 10.14283/jfa.2023.15] [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: 02/18/2023]
Abstract
BACKGROUND Frailty is associated with mortality in older adults hospitalized with COVID-19, yet few studies have quantified healthcare utilization and spending following COVID-19 hospitalization. OBJECTIVE To evaluate whether survival and follow-up healthcare utilization and expenditures varied as a function of claims-based frailty status for older adults hospitalized with COVID-19. DESIGN Retrospective cohort study. PARTICIPANTS 136 patients aged 65 and older enrolled in an Accountable Care Organization (ACO) risk contract at an academic medical center and hospitalized for COVID-19 between March 11, 2020 - June 3, 2020. MEASUREMENTS We linked a COVID-19 Registry with administrative claims data to quantify a frailty index and its relationship to mortality, healthcare utilization, and expenditures over 6 months following hospital discharge. Kaplan Meier curves and Cox Proportional Hazards models were used to evaluate survival by frailty. Kruskal-Wallis tests were used to compare utilization. A generalized linear model with a gamma distribution was used to evaluate differences in monthly Medicare expenditures. RESULTS Much of the cohort was classified as moderate to severely frail (65.4%), 24.3% mildly frail, and 10.3% robust or pre-frail. Overall, 27.2% (n=37) of the cohort died (n=26 during hospitalization, n=11 after discharge) and survival did not significantly differ by frailty. Among survivors, inpatient hospitalizations during the 6-month follow-up period varied significantly by frailty (p=0.02). Mean cost over follow-up was $856.37 for the mild and $4914.16 for the moderate to severe frailty group, and monthly expenditures increased with higher frailty classification (p <.001). CONCLUSIONS In this cohort, claims-based frailty was not significantly associated with survival but was associated with follow-up hospitalizations and Medicare expenditures.
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Affiliation(s)
- T Keeney
- Tamra Keeney, DPT, PhD, Mongan Institute Center for Aging and Serious Illness, Massachusetts General Hospital, 100 Cambridge Street, Suite 1600, Boston MA, 02114,USA, Phone (617) 726-9392,
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Sousa M, Smolen JS, Gorlier C, de Wit M, Coates L, Kalyoncu U, Ruyssen-Witrand A, Leung K, Scrivo R, Cañete JDD, Palominos P, Meisalu S, Balanescu A, Kiltz U, Aydin S, Gaydukova I, Dernis E, Fautrel B, Orbai AM, Lubrano E, Gossec L. POS0004 WHAT DOES WORSENING IN DAPSA DISEASE ACTIVITY CATEGORIES MEAN FOR PATIENTS WITH PSORIATIC ARTHRITIS? AN ANALYSIS OF 222 PATIENTS. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.1493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundIn psoriatic arthritis (PsA), disease activity states have been defined using the DAPSA (Disease Activity index for Psoriatic Arthritis) score (1). The disease activity states have been validated using structural progression as the gold standard (2). However, the worsening in DAPSA states has not been compared to the patient’s perspective.ObjectivesTo assess the association between a worsening in disease activity (i.e., change in DAPSA disease activity category) versus the patient’s judgement of disease worsening.MethodsReFlap (NCT03119805) was a longitudinal study in 14 countries of consecutive adult patients with definite PsA and more than 2 years of disease duration. Patients were seen twice in the context of usual care, around 4 months apart (3). Worsening in disease activity between the 2 visits was defined as a transition to a more active disease category, based on the DAPSA categories [(remission, low disease activity (LDA), moderate disease activity (MDA) and high disease activity (HDA)] (1).This change was compared to (a) patient perceived-flares collected according to a patient-reported question: “At this time, are you having a flare of your psoriatic arthritis, if this means the symptoms are worse than usual?”; and (b) a worsening according to the MCID (Minimal Clinical Important Difference) question. The agreement between the definitions of worsening were calculated by frequency, Cohen’s kappa and prevalence adjusted bias adjusted kappa (PABAK). There was no imputation of missing data.ResultsOverall, 222 patients were analyzed: 127 (58.8%) were male, aged 53.5±12.3 years and with 10.8±8.3 years of disease duration. Disease activity was moderate: 35.9% had no current psoriasis skin lesions, mean tender joint count (TJC, 0-68) was 3.0±7.5, mean swollen joint count (SJC, 0-66) was 1.6±6.6, and mean DAPSA was 11.5±14.0.At 4.5±2.2 months follow-up, the proportion of DAPSA worsening was 40.1% [95% confidence interval, 33.9-46.7] (n=89). Most of the changes corresponded to patients going from remission to LDA (N=24, 27.0% of worsened patients) or from LDA to MDA (N=24, 27.0%).Patient-reported flares were reported in 27.0% [21.6-33.2] (n=60), and MCID worsening was reported in 14.0% [33.9-46.5] (n=31).Figure 1 shows the distribution of patients with worsening in DAPSA category, versus patient-defined worsening. Of the 89 patients who worsened according to DAPSA categories, 41 (46.1%) had self-perceived flares and 20 (22.5%) had worsening according to MCID. Among patients who worsened in DAPSA category, the mean change in DAPSA was higher in patients with self-perceived flares (increase of 22.2±15.0) than in patients without self-perceived flares (increase of 14.3±12.3). Of 133 patients with no worsening according to DAPSA, 114 (85.7%) had no self-perceived flares and 122 (91.7%) had no MCID worsening. The kappa [95% confidence interval] (PABAK) coefficients between DAPSA and either patient flare or MCID worsening were 0.34 [0.21-0.46] (0.40) and 0.16 [0.05-0.27] (0.28), respectively.Figure 1.Venn diagram for disease worsening between 2 visitsConclusionAfter 4 months of follow-up, 40.1% patients with long-standing PsA had a change in DAPSA category corresponding to more active disease. Most of these changes reflected transitions from remission to LDA, or from LDA to MDA. Among patients changing DAPSA category, only 46.1% reported themselves in flare at the second visit and only 22.5% reported themselves as worsened by MCID, leading to only fair (for flares) to low (for MCID worsening) agreement between the assessments of worsening. It is important to assess both disease activity, and the patient’s perspective of flare.References[1]Schoels M, et al. Ann Rheum Dis. 2016;75(5):811-8.[2]Aletaha D, et al. Ann Rheum Dis. 2017;76(2):418-421.[3]Gorlier C, et al. Ann Rheum Dis 2019;78:201-208.Disclosure of InterestsNone declared
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Tse YK, Li HL, Yu SY, Wu MZ, Ren QW, Chen Y, Yu SY, Wong PF, Lam LY, Li KY, Leung KL, Tse HF, Yiu KH. Prognostic value of longitudinal assessment of hepatorenal function and nutritional status in patients undergoing valvular heart surgery. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.2260] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Hepatorenal dysfunction and malnutrition are frequent extracardiac consequences of valvular heart disease (VHD) and have emerged as prominent drivers of adverse prognosis in selected valvular interventions. Nonetheless, data in a general VHD population is sparse, and their interaction and changes following valvular surgery remain unexplored.
Purpose
We aim to characterise the temporal changes, interaction, and prognostic implications of hepatorenal dysfunction and malnutrition before and after valvular surgery.
Methods
Baseline and temporal changes in hepatorenal dysfunction (assessed by the modified model for end-stage liver disease [MELD-XI] score) and nutritional status (assessed by Controlling Nutritional Status [CONUT] score) were correlated with adverse events (composite of all-cause mortality and hospitalisation for heart failure) using Cox proportional hazards model, adjusted with clinical and echocardiographic covariates, medications, type of valvular procedure, and cardiac surgery risk-stratification models (EuroSCORE II and STS score).
Results
Our study included 909 patients who underwent valvular surgery. At baseline, 216 (24%) and 554 (61%) had hepatorenal dysfunction (MELD-XI >12.43) and malnutrition (CONUT ≥2), respectively. MELD-XI scores were modestly correlated with CONUT scores (R=0.36, p<0.001), with concomitant hepatorenal dysfunction and malnutrition present in 177 (19%) patients.
Over a median follow-up of 4.1 years, 101 (11%) patients died and 119 (13%) were hospitalised for heart failure. There was a stepwise increase in mortality (χ2 89.1, p<0.001) and adverse events (χ2 92.9, p<0.001) from patients with normal hepatorenal function and nutrition to concomitant hepatorenal dysfunction and malnutrition (Figure 1). This association remained consistent in fully adjusted models. MELD-XI and CONUT scores significantly improved the discriminatory accuracy of EuroSCORE II (area under the curve [AUC]: 0.80 vs 0.73, p<0.001) and STS score (AUC: 0.79 vs 0.72, p=0.004) for all-cause mortality.
In patients with MELD-XI and CONUT scores 1 year after surgery (n=707), ΔMELD-XI (follow-up MELD-XI minus baseline MELD-XI score) and ΔCONUT scores were significantly associated with adverse events (HR 1.08, 95% CI 1.03–1.14, p=0.001 for ΔMELD-XI; HR 1.18, 95% CI 1.02–1.35, p=0.02 for ΔCONUT). Patients remaining with hepatorenal dysfunction and malnutrition experienced worse survival (log-rank χ2 65.2, p<0.001) and adverse events (log-rank χ2 90.4, p<0.001) (Figure 2).
Conclusions
In patients undergoing valvular surgery, hepatorenal function and nutritional status at baseline, and their temporal changes, are strongly linked to clinical outcomes. These results highlight the role of hepatorenal and nutritional assessment for risk-stratification in valvular surgery.
Funding Acknowledgement
Type of funding sources: None. Figure 1Figure 2
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Affiliation(s)
- Y K Tse
- The University of Hong Kong, Hong Kong, Hong Kong
| | - H L Li
- The University of Hong Kong, Hong Kong, Hong Kong
| | - S Y Yu
- The University of Hong Kong, Hong Kong, Hong Kong
| | - M Z Wu
- The University of Hong Kong, Hong Kong, Hong Kong
| | - Q W Ren
- The University of Hong Kong, Hong Kong, Hong Kong
| | - Y Chen
- The University of Hong Kong, Hong Kong, Hong Kong
| | - S Y Yu
- The University of Hong Kong, Hong Kong, Hong Kong
| | - P F Wong
- The University of Hong Kong, Hong Kong, Hong Kong
| | - L Y Lam
- The University of Hong Kong, Hong Kong, Hong Kong
| | - K Y Li
- The University of Hong Kong, Hong Kong, Hong Kong
| | - K L Leung
- The University of Hong Kong, Hong Kong, Hong Kong
| | - H F Tse
- The University of Hong Kong, Hong Kong, Hong Kong
| | - K H Yiu
- The University of Hong Kong, Hong Kong, Hong Kong
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Hanna N, Leung K, Hernandez L, Sleiman J, Ruiz DM, Perez E, Sarkar A, Nimmagadda M, Heller E, Camargo AL, Zandiyeh M, Madison J, Alvarez A, Shriver A, Sabatino D, Schtupak N, Verghese D, Sheffield C, Brozzi N, Hakemi E, Noguera E, Cudemus G, Fermin L, Minear S, Velez M, Navas V, Cubeddu R, Navia J, Hernandez-Montfort J. Bridge to Remission in Biventricular Cardiogenic Shock Associated with Endocrine Cardiomyopathy. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.1296] [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: 11/16/2022] Open
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Jawaid N, Leung K, Bollegala N. A96 GENDER DIFFERENCES IN GASTROENTEROLOGY AND HEPATOLOGY AUTHORSHIP AND EDITORIAL BOARDS. J Can Assoc Gastroenterol 2021. [DOI: 10.1093/jcag/gwab002.094] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Background
Women are numerically under-represented in the field of gastroenterology and hepatology.
Aims
To characterize the gender distribution of first and senior authors and editorial board members of the highest impact factor journals in gastroenterology and hepatology.
Methods
Using Clarivate Journal Citation Report 2019, the 28 highest ranked journals within gastroenterology and hepatology were selected for review, along with the Journal of the Canadian Association of Gastroenterology. Publications between January 1 to December 31, 2019 were included. Gender of board members and authors was identified using publicly available data. Spearman correlation coefficients were calculated using SPSS to assess for a relationship between editorial board, first author, and senior author gender as well as impact factor.
Results
Of 29 journals assessed with a median impact factor of 5.55 (IQR 3.72–9.10), 357 journal issues and 8036 articles were reviewed. Three journals were headed by female chief editors, constituting 7.7% of all editors-in-chief (3/39). In total, females made up 17.1% of editorial board members (n=584). Of 8036 first authors, 2547 (31.7%) were female. Of 7335 senior authors, 1390 (19.3%) were female. There were no statistically significant correlations between impact factor and gender. Chief editor gender did not significantly correlate with gender distribution of editorial boards, first or senior authors. There was a significant positive correlation between male-dominated editorial boards and male first and senior authorship, versus a significant negative correlation between male-dominated editorial boards and female first and senior authorship. A positive correlation exists for the same gender between first and senior authors.
Conclusions
Although gender distribution of female first and senior authorship approaches current distributions in the field of gastroenterology and hepatology, editor-in-chief positions and editorial board membership on journals continue to be occupied by men in higher proportions. Future endeavors such as diversity statements and mentorship may help to balance these distributions in the future.
Funding Agencies
None
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Affiliation(s)
- N Jawaid
- Gastroenterology, University of Toronto, Toronto, ON, Canada
| | - K Leung
- Gastroenterology, University of Toronto, Toronto, ON, Canada
| | - N Bollegala
- GI, Women’s College Hospital, Toronto, ON, Canada
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Leung K, Jaberi A, Kachura J, Duan K, Wong D. A228 WHEN ASCITES & VARICEAL BLEEDING ARE NOT FROM CIRRHOSIS: A CASE OF MUTIPLE ARTERIOPORTAL FISTULAE CAUSING PORTAL HYPERTENSION. J Can Assoc Gastroenterol 2021. [DOI: 10.1093/jcag/gwab002.226] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Portal hypertension is usually due to increased resistance from cirrhosis. However, pressures can also be elevated due to increased flow.
Aims
To describe a peculiar case of non-cirrhotic portal hypertension.
Methods
A case report and literature review was performed.
Results
A 47-year-old previously well man presented with a 6 month history of rapidly progressive weight loss, ascites and variceal bleed. Workup ruled out common causes of primary liver disease. Initial imaging demonstrated a heterogenous liver, splenomegaly, ascites, patent hepatic/portal veins and multiple poorly defined low-density hepatic lesions with the largest measuring 2.1 cm. Transient elastography was 7.3 kPa (F1-mild fibrosis). At transjugular liver biopsy, hepatic venogram ruled out Budd-Chiari and hepatic vein pressure gradient was normal at 3–4 mmHg. Histology unfortunately showed hemangioma. A percutaneous liver biopsy suggested nodular regenerative hyperplasia, minimal fibrosis and mild cholestasis. Given worsening ascites, hyponatremia and 7 months of rapidly progressive decline, transjugular intrahepatic portosystemic shunt (TIPSS) was inserted. Intra-procedure, portal vein pressure was noted to be 51 mmHg, with a portosystemic gradient of 42 mmHg. Although numerous abdominal CT and MRI did not show AV shunting, ultrasound post-TIPSS showed hepatic pseudoaneurysms & arterioportal fistulae (APF). Direct angiogram showed numerous hepatic pseudoaneurysms and intrahepatic fistulae making embolization impossible. CT showed no evidence of pseudoaneurysms or fistulae outside of the liver. Workup for autoimmune rheumatological diseases and congenital telangiectatic syndromes were negative. Given the high pressures being directed through the new TIPSS, right heart failure is an ongoing concern.
APF are rarely encountered causes of presinusoidal portal hypertension, with communications most commonly arising from the hepatic (65%) & splenic arteries (11%) & the portal vein. Causes include traumatic (28%), iatrogenic (16%), vascular/telangiectatic malformations (15%), tumors (15%), aneurysms (14%) & congenital disease. Endovascular embolization can be used to treat single lesions. In complex cases with mulitple APF, surgery and/or liver transplantation may be required.
Conclusions
We report a rare case of non-cirrhotic portal hypertension due to increased flow rather than increased resistance secondary to APF.
Funding Agencies
None
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Affiliation(s)
- K Leung
- University of Toronto, Toronto, ON, Canada
| | - A Jaberi
- University of Toronto, Toronto, ON, Canada
| | - J Kachura
- University of Toronto, Toronto, ON, Canada
| | - K Duan
- University of Toronto, Toronto, ON, Canada
| | - D Wong
- University of Toronto, Toronto, ON, Canada
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Kim J, Yu JZ, Chan RHW, Leung KL, Sumerlin TS, Fong B, Siu S, Lee JJ, Chung RY. Knowledge, attitudes and binge drinking among urban Chinese university students in Hong Kong. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa166.396] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Although dormitory residents have been identified as a high-risk group for alcohol misuse in Chinese university settings, the factors associated with their drinking behaviors has not be characterized.
Methods
A cross-sectional study was conducted among hostel residents in two Hong Kong universities (n = 1455) using self-administered, anonymous surveys. In addition to examining the knowledge levels and drinking-related attitudes, we examined the factors associated with binge drinking in this population using multivariable regression analysis.
Results
Among university dormitory residents, the prevalence of past-month binge drinking was 26.8% among males and 12.8% among females. It was noted that although respondents demonstrated attitudes conducive towards alcohol-free socialization, they exhibited low levels of alcohol-related knowledge (mean knowledge score: 3.3/ 10, SD = 2.0). While about 59% were aware that alcohol is a carcinogen and that some medications should not be taken with alcohol, only 10.4% were familiar with symptoms of alcohol poisoning and only 23% were familiar with relative amounts of alcohol in different beverage categories. Of the respondents the factors independently associated with past-month binge drinking were: male sex, older age, full-time hostel residence, drinking roommates, drinking romantic partner, participation in drinking games, and having pro-alcohol attitudes (OR ranging from 1.33-3.69). Alcohol-related knowledge was not associated with binge drinking.
Conclusions
Although southern China is a low alcohol consumption area, binge drinking is common among university residents and requires multi-prong interventions. Heavy drinking is a neglected health problem among urban Chinese university students. Interventions targeting binge drinkers need to counteract pro-alcohol attitudes and peer effects. Increasing alcohol knowledge may additionally help to reduce alcohol-related harms in this age group.
Key messages
Urban Chinese university dormitory residents demonstrate low levels of alcohol knowledge. Pro-alcohol attitudes and peers effects need to be addressed in university anti-binge drinking interventions.
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Affiliation(s)
- J Kim
- The School of Public Health & Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - J Z Yu
- The School of Public Health & Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - R H W Chan
- The School of Public Health & Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - K L Leung
- The School of Public Health & Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - T S Sumerlin
- The School of Public Health & Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - B Fong
- Hong Kong Polytechnic University, Hong Kong, China
| | - S Siu
- KELY Organization, Hong Kong, China
| | - J J Lee
- The School of Nursing, Hong Kong University, Hong Kong, China
| | - R Y Chung
- The School of Public Health & Primary Care, The Chinese University of Hong Kong, Hong Kong, China
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Kim J, Chan RHW, Leung KL, Chan KYM, Chung RY, Fong B, Sumerlin TS, Siu S, Lee JJ. Second-hand harms of alcohol use in urban Chinese university students: A study from Hong Kong. Eur J Public Health 2020. [DOI: 10.1093/eurpub/ckaa166.383] [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] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Although second-harms alcohol harms, harms caused by the drinking of others, may contribute significantly to the public health burden of alcohol, these harms are an understudied area of public health research. This study aims to examine second-hand alcohol harms in among urban Chinese university students residing on campus who are were previously identified as a high risk group for alcohol misuse.
Methods
A cross-sectional study was conducted among hostel residents in two Hong Kong universities (n = 1455) using self-administered, anonymous surveys. We examined the prevalance and the factors associated with second-hand alcohol harms this population using multivariable regression analysis.
Results
Approximately 2/3 of the university residents experienced at least one second-hand drinking harm in the past year while 1/5 experienced 4 or more harms. The harms reported were: 1) inconveniences/disturbances (46.2%), psychological distress/anxiety/depression (32.9%), home arguments (28.3%), conflicts/arguments/insults in public (25.3%), worsened productivity/academics (22.2%), property damage/monetary loss (13.2%), accidents/injury/assault (11.7%) and having to deal with authorities/law enforcement (11.5%). Only 9.1% reported these harms to authorities. Participation in drinking games (OR = 1.44), having drinking roomates (OR = 1.37) or drinking romantic partner (OR = 1.89) were independently associated with likelihood of second-hand alcohol harms (p < 0.05).
Conclusions
Although southern China is a low alcohol consumption region, there is a high prevalence of second-hand alcohol harms among university dorm residents. Universities in the region should rectify the near absence of alcohol-related topics in university health promotion.
Key messages
Harms from the drinking of others is a commonplace but underappreciated phenomenon among university campus residents. University health promotion in the region should include alcohol harms reduction topics.
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Affiliation(s)
- J Kim
- The School of Public Health & Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - R H W Chan
- The School of Public Health & Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - K L Leung
- The School of Public Health & Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - K Y M Chan
- The School of Public Health & Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - R Y Chung
- The School of Public Health & Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - B Fong
- Hong Kong Polytechnic University, Hong Kong, China
| | - T S Sumerlin
- The School of Public Health & Primary Care, The Chinese University of Hong Kong, Hong Kong, China
| | - S Siu
- KELY Organization, Hong Kong, China
| | - J J Lee
- The School of Nursing, Hong Kong University, Hong Kong, China
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Affiliation(s)
- K L Hon
- Department of Paediatrics and Adolescent Medicine, The Hong Kong Children's Hospital, Kowloon Bay, Hong Kong.,Department of Paediatrics, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - A K C Leung
- Department of Pediatrics, The University of Calgary and The Alberta Children's Hospital, Calgary, Alberta, Canada
| | - K Leung
- Department of Paediatrics and Adolescent Medicine, The Hong Kong Children's Hospital, Kowloon Bay, Hong Kong
| | - G C F Chan
- Department of Paediatrics and Adolescent Medicine, The Hong Kong Children's Hospital, Kowloon Bay, Hong Kong.,Department of Paediatrics and Adolescent Medicine, The University of Hong Kong, Pokfulam, Hong Kong
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Liu D, Leung K, Jit M, Yu H, Yang J, Liao Q, Liu F, Zheng Y, Wu JT. Cost-effectiveness of bivalent versus monovalent vaccines against hand, foot and mouth disease. Clin Microbiol Infect 2020; 26:373-380. [PMID: 31279839 PMCID: PMC6942242 DOI: 10.1016/j.cmi.2019.06.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 06/20/2019] [Accepted: 06/22/2019] [Indexed: 11/18/2022]
Abstract
OBJECTIVES Enterovirus 71 (EV71) and coxsackievirus A16 (CA16) were responsible for 43.3% (235 123/543 243) and 24.8% (134 607/543 243) of all laboratory-confirmed hand, foot and mouth disease (HFMD) cases during 2010-2015 in China. Three monovalent EV71 vaccines have been licensed in China while bivalent EV71/CA16 vaccines are under development. A comparative cost-effectiveness analysis of bivalent EV71/CA16 versus monovalent EV71 vaccination would be useful for informing the additional value of bivalent HFMD vaccines in China. METHODS We used a static model parameterized with the national HFMD surveillance data during 2010-2013, virological HFMD surveillance records from all 31 provinces in mainland China during 2010-2013 and caregiver survey data of costs and health quality of life during 2012-2013. We estimated the threshold vaccine cost (TVC), defined as the maximum additional cost that could be paid for a cost-effective bivalent EV71/CA16 vaccine over a monovalent EV71 vaccine, as the outcome. The base case analysis was performed from a societal perspective. Several sensitivity analyses were conducted by varying assumptions governing HFMD risk, costs, discounting and vaccine efficacy. RESULTS In the base case, choosing the bivalent EV71/CA16 over monovalent EV71 vaccination would be cost-effective only if the additional cost of the bivalent EV71/CA16 compared with the monovalent EV71 vaccine is less than €4.7 (95% CI 4.2-5.2). Compared with the TVC in the base case, TVC increased by up to €8.9 if all the test-negative cases were CA16-HFMD; decreased by €1.1 with an annual discount rate of 6% and exclusion of the productivity loss; and increased by €0.14 and €0.3 with every 1% increase in bivalent vaccine efficacy against CA16-HFMD and differential vaccine efficacy against EV71-HFMD, respectively. CONCLUSIONS Bivalent EV71/CA16 vaccines can be cost-effective compared with monovalent EV71 vaccines, if suitably priced. Our study provides further evidence for determining the optimal use of HFMD vaccines in routine paediatric vaccination programme in China.
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Affiliation(s)
- D Liu
- WHO Collaborating Centre for Infectious Disease Epidemiology and Control, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - K Leung
- WHO Collaborating Centre for Infectious Disease Epidemiology and Control, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China
| | - M Jit
- WHO Collaborating Centre for Infectious Disease Epidemiology and Control, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China; Modelling and Economics Unit, Public Health England, London, UK; Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, UK
| | - H Yu
- School of Public Health, Fudan University, Key Laboratory of Public Health Safety, Ministry of Education, Shanghai, China
| | - J Yang
- School of Public Health, Fudan University, Key Laboratory of Public Health Safety, Ministry of Education, Shanghai, China
| | - Q Liao
- Key Laboratory of Surveillance and Early-warning on Infectious Disease, Division of Infectious Disease, Chinese Centre for Disease Control and Prevention, Beijing, China
| | - F Liu
- Key Laboratory of Surveillance and Early-warning on Infectious Disease, Division of Infectious Disease, Chinese Centre for Disease Control and Prevention, Beijing, China
| | - Y Zheng
- Key Laboratory of Surveillance and Early-warning on Infectious Disease, Division of Infectious Disease, Chinese Centre for Disease Control and Prevention, Beijing, China
| | - J T Wu
- WHO Collaborating Centre for Infectious Disease Epidemiology and Control, School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR, China.
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12
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Leung K, Habal F, Alrukaibi M, Liu LW. A133 DEVELOPMENT OF TYPE 3 ACHALASIA WITH DISTANT PANCREATIC MALIGNANCY. J Can Assoc Gastroenterol 2020. [DOI: 10.1093/jcag/gwz047.132] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Pseudoachalasia is often caused by malignant involvement at the gastroesophageal junction (GEJ) leading to dysphagia.
Aims
We describe a case of type 3 achalasia presenting in a woman with metastatic pancreatic cancer with no direct involvement at the GEJ, fundus or cardia.
Methods
A case report and literature review were performed.
Results
A 53-year-old woman presented with a 2-month-history of progressive abdominal pain, nausea and vomiting with a 30-pound weight loss. She had a remote history of breast cancer in remission after surgery and chemoradiation. On presentation, she denied chest pain, reflux, dysphagia or odynophagia. Abdominal exam revealed focal epigastric tenderness and jaundice. Abdominal CT showed a 6.7 x 5.8 cm conglomerate mass involving the hepatic hilum, pancreatic head, duodenum, common bile duct, and portal vein with gastric outlet and biliary obstruction. This mass was confirmed to be a pancreatic adenocarcinoma on pathology. She then underwent nasogastric tube decompression. Initial esophagogastroduodenoscopy (EGD) confirmed a stenotic area at the distal duodenal cap. A duodenal stent and common bile duct stent were placed during a second EGD. The esophagus and GEJ were unremarkable on both endoscopic exams. She was started on chemotherapy with gemcitabine and abraxane. Two weeks after her stent placement, she rapidly developed severe retrosternal squeezing discomfort and choking occurring with swallowing. CT chest and abdomen were negative for any intrathoracic and diaphragmatic involvement with stability of the mass. A barium swallow study demonstrated tertiary contractions in the thoracic esophagus with marshmallow hold-up in the distal esophagus. She then underwent a high-resolution esophageal manometry study that demonstrated an elevation of integrated residual pressure (IRP) of the lower esophageal sphincter (LES) and absence of peristalsis, with the distal 2/3rds of the esophagus showing a simultaneous and prolonged pressure front consistent with type 3 achalasia, Chicago classification v3.0 [Figure 1]. All contractions had a distal contractile integral (DCI) of >8000 mmHg-cm-s. She experienced significant symptom improvement with pinaverium bromide, a gut-specific calcium channel antagonist.
A review of the literature revealed that there have been 4 English-language cases published on pseudoachalasia associated with pancreatic cancer, with all cases describing direct infiltration of pancreatic cancer in the GEJ, cardia or fundus with manometric features of type I achalasia.
Conclusions
We report the first case of type 3 achalasia with no evidence of direct malignant infiltration at the GEJ on radiographic and endoscopic evaluations. Possible mechanisms to explain this phenomenon include paraneoplastic antibody-mediated impairment of enteric neurons that decrease nitric oxide availability, or microscopic disease involvement at the GEJ.
Funding Agencies
None
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Affiliation(s)
- K Leung
- Division of Gastroenterology, Department of Medicine, University Health Network, University of Toronto, Toronto, ON, Canada
| | - F Habal
- Division of Gastroenterology, Department of Medicine, University Health Network, University of Toronto, Toronto, ON, Canada
| | - M Alrukaibi
- Division of Gastroenterology, Department of Medicine, University Health Network, University of Toronto, Toronto, ON, Canada
| | - L W Liu
- Division of Gastroenterology, Department of Medicine, University Health Network, University of Toronto, Toronto, ON, Canada
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13
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Leung K, Tandon P, Govardhanam V, Maxwell C, Huang V. A220 A COMPREHENSIVE SYSTEMATIC REVIEW AND META-ANALYSIS OF THE RISK OF ADVERSE NEONATAL OUTCOME IN INFLAMMATORY BOWEL DISEASE AND PREGNANCY. J Can Assoc Gastroenterol 2020. [DOI: 10.1093/jcag/gwz047.219] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Inflammatory bowel disease (IBD) often affects women in their child-bearing years. These women may be at an increased risk of adverse neonatal outcomes.
Aims
The aim of this study was to evaluate the risk of these outcomes in this population of patients, with an emphasis of determining risk factors for development of these conditions.
Methods
Medline, Embase, and Cochrane library were searched through to May 2019 for studies reporting adverse neonatal outcomes in IBD patients. Weighted odds ratios (OR) with 95% confidence intervals (CI) were calculated to assess the risk of these outcomes in patients with IBD compared to healthy controls, with risk factors such as disease activity and medication exposure also being assessed.
Results
Sixty studies were included (8194 pregnancies with inflammatory bowel disease and 3253 healthy pregnancies). Compared to healthy controls, patients with inflammatory bowel disease were more likely to deliver infants with low birth weight (LBW) (OR 2.78, 95% CI 1.16–6.66) and infants who were admitted to the neonatal intensive care unit (NICU) (OR 3.33, 95% CI 1.83–6.05). Patients with Crohn’s disease had an increased risk of infants born with congenital anomalies (OR 3.03, 95% CI, 1.43–6.42), whereas patients with ulcerative colitis had an increased risk of preterm delivery (OR 2.68, 95% CI, 1.12–6.43). Active disease increased the risk of preterm birth (OR 2.06, 95% CI 1.21–3.51), LBW (OR 2.96, 95% CI 1.54–5.70), and small for gestation age (OR 2.62, 95% CI 1.18–5.83) compared to disease in remission. Tumor necrosis factor antagonists was associated with increased risk of NICU admission (OR 2.42, 95% CI 1.31–4.45) and LBW (OR 1.54, 95% CI, 1.01–2.35).
Conclusions
Patients with inflammatory bowel disease are at an increased risk of developing adverse neonatal outcomes such as preterm birth, LBW, congenital anomalies, and NICU admissions. Patients with clinically active disease and those exposed to anti-TNF therapy may be at higher risk of developing these adverse outcomes. The findings of this study are important to communicate to patients and healthcare providers alike. Furthermore, this information may help to mitigate these risks through collaborative specialized care during pregnancy in order to reduce the overall morbidity and mortality for both mother and baby.
Funding Agencies
None
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Affiliation(s)
- K Leung
- University of Toronto, Toronto, ON, Canada
| | - P Tandon
- University of Toronto, Toronto, ON, Canada
| | | | - C Maxwell
- University of Toronto, Toronto, ON, Canada
| | - V Huang
- University of Toronto, Toronto, ON, Canada
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14
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Govardhanam V, Tandon P, Leung K, Maxwell C, Huang V. A250 SYSTEMATIC REVIEW WITH META-ANALYSIS: ADVERSE PREGNANCY-RELATED OUTCOMES WITH INFLAMMATORY BOWEL DISEASE. J Can Assoc Gastroenterol 2020. [DOI: 10.1093/jcag/gwz047.249] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Inflammatory bowel disease (IBD) is a chronic inflammatory condition. While it is reported that IBD may result in adverse pregnancy-related outcomes, its effects on placental related diseases are relatively not known.
Aims
The aim of our work was to determine the risk of adverse pregnancy outcomes in patients with IBD.
Methods
Medline, Embase, and Cochrane library were searched for studies that reported adverse maternal and obstetrical outcomes in patients with IBD. Weighted odds ratios (OR) with 95% confidence intervals (CI) were calculated for the risk of these outcomes in patients with IBD compared to healthy controls.
Results
Fifty-three studies were included (7917 patients with IBD and 3253 healthy controls). Cesarean delivery was more common in patients with IBD compared to healthy controls (OR 1.79, 95% CI, 1.16–2.77). This remained significant for UC (OR 1.80, 95% CI, 1.21–2.90) but not CD (OR 1.48, 95% CI, 0.94–2.34). Similarly, gestational diabetes occurred more commonly in IBD (OR 2.96, 95% CI, 1.47–5.98). Furthermore, the incidences of placental diseases were low, 2.0% (95% CI, 0.9–3.1%) for pre-eclampsia, 3.3% (95% CI, 0–7.2%) for placental abruption, 0.5% (95% CI, 0.2–0.9%) for placenta previa, and 0.3% (95% CI, 0–0.5%) for chorioamnionitis. Finally, patients with IBD were more likely to experience preterm premature rupture of membranes (PPROM, OR 12.10, 95% CI, 2.15–67.98), but not an early pregnancy loss (OR 1.63, 95% CI 0.49–5.43). Anti-tumour necrosis factor therapy was not associated with chorioamnionitis (OR 1.12, 95% CI, 0.16–7.67), early pregnancy loss (OR 1.49, 95% CI, 0.83- 2.64), and placenta previa (OR 1.58, 95% CI, 0.30–8.47).
Conclusions
Patients with IBD are more likely to develop adverse pregnancy-related outcomes such as Gestational Diabetes and PPROM. Pregnancy in patients with IBD should be considered a high-risk period and as such, a multi-disciplinary team, including gastroenterologists, obstetricians and maternal-fetal medicine specialists, is necessary to recognize and effectively manage adverse obstetrical outcomes in order to reduce overall morbidity and mortality.
Funding Agencies
None
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Affiliation(s)
| | - P Tandon
- University of Toronto, Woodbridge, ON, Canada
| | - K Leung
- Internal Medicine, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada
| | - C Maxwell
- University of Toronto, Woodbridge, ON, Canada
| | - V Huang
- University of Toronto, Woodbridge, ON, Canada
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15
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Leung KL, Fong W, Freedman B, Bajorek B, Lee VWY. Association between beta-blocker use and obesity in Hong Kong Chinese elders: a post-hoc analysis. Hong Kong Med J 2020; 26:27-34. [PMID: 32051330 DOI: 10.12809/hkmj198077] [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 Studies of Caucasian populations have shown that beta-blockers may exacerbate weight gain, a risk factor for many chronic diseases. Still, beta-blockers are the most prescribed antihypertensives in the Chinese population in Hong Kong. We aimed to explore the association between beta-blocker use, hypertension, and weight status of this population. METHODS A post-hoc analysis regarding body mass index (BMI) and the use of beta-blockers was performed based on the medication profile of community-dwelling older adults. Participants' BMI, hypertension diagnosis, name, dose, frequency, route of administration of beta-blockers, and other drugs that may alter body weight were recorded. RESULTS Of 1053 Chinese individuals aged ≥65 years (mean age 76.9±7.2 years, 80% female) from 32 elderly centres in Hong Kong, 18% (185/1053) of them consumed beta-blockers. That group also had a significantly larger proportion of obese individuals (45.9% vs 32.1%, P=0.002). After adjusting for other weight-altering drugs, beta-blockers remained a significant predictor of overweight and obesity (P=0.001). As the hypertensive population had significantly higher BMI than the normotensive population (24.3±3.6 vs 22.9±3.5, P<0.001), a sub-analysis on those with hypertension diagnosis confirmed that only the hypertensive population taking atenolol had a significantly larger population of obese individuals (BMI ≥25) compared with those who took metoprolol (58.9% vs 38.5%, P=0.03) and those who did not take any beta-blockers (58.9% vs 38.4%, P=0.007). CONCLUSIONS Our findings taken together with other guideline reservations cast doubt on whether beta-blockers, particularly atenolol, should be the major drug prescribed to older adults with hypertension.
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Affiliation(s)
- K L Leung
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - W Fong
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - B Freedman
- Heart Research Institute, Charles Perkins Centre, University of Sydney, Sydney, Australia
| | - B Bajorek
- Graduate School of Health, University of Technology Sydney, Sydney, Australia
| | - V W Y Lee
- Centre for Learning Enhancement And Research, The Chinese University of Hong Kong, Shatin, Hong Kong
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16
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Lee CF, Zhou K, Young WM, Wong CS, Ng TY, Lee SF, Leung K, Wong LKM, So KH, Tang W, Chong G, Chan SK, Yip YTE, Ma VYM, Yeung A, Chin CHY, Kwan MW, Tsang HT. Febrile neutropenia and its associated hospitalization in breast cancer patients on docetaxel-containing regimen: A retrospective cohort study on duration of prophylactic GCSF administration. Support Care Cancer 2019; 28:3801-3812. [PMID: 31832822 DOI: 10.1007/s00520-019-05111-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 08/04/2019] [Accepted: 09/30/2019] [Indexed: 01/03/2023]
Abstract
PURPOSE To compare febrile neutropenia (FN) incidence and hospitalization among breast cancer patients on docetaxel with no granulocyte colony-stimulating factors (GCSF) primary prophylaxis (PP), 4/5-day PP, or 7-day PP. METHODS We identified 3916 breast cancer patients using docetaxel-cyclophosphamide (TC), doxorubicin-cyclophosphamide then docetaxel (AC-T), fluorouracil-epirubicin-cyclophosphamide then docetaxel (FEC-T), docetaxel-carboplatin-trastuzumab (TJH), or docetaxel-doxorubicin-cyclophosphamide (TAC) from a hospital pharmacy dispensing database in Hong Kong between 2014 and 2016. Patients were offered GCSF within 5 days since administering docetaxel. Outcomes included FN incidence, time to first hospitalization, hospitalization rate, and duration. RESULTS In TC regimen, FN incidence (with odds ratio, OR) of patients with no PP, 4/5-day PP, and 7-day PP was 21.69%, 7.95% (OR 0.31, p < 0.001), and 5.33% (OR 0.20, p < 0.001), respectively. In TJH regimen, FN incidence of patients with no PP, 4/5-day PP, and 7-day PP was 38.26%, 8.33% (OR 0.15, p < 0.001), and 8.57% (OR 0.15, p < 0.001), respectively. FN incidence of patients on AC-T regimen with no PP and 4/5-day PP was 20.93% and 6.84%, respectively (OR 0.28, p = 0.005); with FEC-T regimen, the incidence was 9.91% and 4.77%, respectively (OR 0.46, p = 0.035). Only 3.27% FN cases were not hospitalized. Mean (±standard deviation, SD) time to first hospitalization was 8.21 ± 2.44 days. Mean (±SD) duration of hospitalization for patients with no PP, 4/5-day PP, and 7-day PP was 4.66 ± 2.60, 4.37 ± 2.85, and 5.12 ± 2.97 days, respectively. CONCLUSION GCSF prophylaxis in breast cancer patients on docetaxel could reduce FN incidence and hospitalization. 4/5-day PP demonstrated similar efficacy to 7-day PP with superior saving benefits on healthcare expenditure.
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Affiliation(s)
- C F Lee
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong. .,Department of Pharmacy, Tuen Mun Hospital, Tuen Mun, Hong Kong.
| | - K Zhou
- School of Pharmacy, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - W M Young
- Department of Pharmacy, Tuen Mun Hospital, Tuen Mun, Hong Kong.,COC Pharmaceutical Service - Oncology Working Group, Hospital Authority, Kowloon, Hong Kong
| | - C S Wong
- Department of Clinical Oncology, Tuen Mun Hospital, Tuen Mun, Hong Kong
| | - T Y Ng
- Department of Clinical Oncology, Tuen Mun Hospital, Tuen Mun, Hong Kong
| | - S F Lee
- Department of Clinical Oncology, Tuen Mun Hospital, Tuen Mun, Hong Kong
| | - K Leung
- COC Pharmaceutical Service - Oncology Working Group, Hospital Authority, Kowloon, Hong Kong.,Department of Pharmacy, Queen Mary Hospital, Pok Fu Lam, Hong Kong
| | - L K M Wong
- COC Pharmaceutical Service - Oncology Working Group, Hospital Authority, Kowloon, Hong Kong.,Department of Pharmacy, Queen Elizabeth Hospital, Kowloon, Hong Kong
| | - K H So
- COC Pharmaceutical Service - Oncology Working Group, Hospital Authority, Kowloon, Hong Kong.,Department of Pharmacy, Prince of Wales Hospital, Sha Tin, Hong Kong
| | - W Tang
- COC Pharmaceutical Service - Oncology Working Group, Hospital Authority, Kowloon, Hong Kong.,Department of Pharmacy, United Christian Hospital, Kwun Tong, Hong Kong
| | - G Chong
- COC Pharmaceutical Service - Oncology Working Group, Hospital Authority, Kowloon, Hong Kong.,Department of Pharmacy, United Christian Hospital, Kwun Tong, Hong Kong
| | - S K Chan
- Department of Pharmacy, Princess Margaret Hospital, Kwai Chung, Hong Kong
| | - Y T E Yip
- COC Pharmaceutical Service - Oncology Working Group, Hospital Authority, Kowloon, Hong Kong.,Department of Pharmacy, Princess Margaret Hospital, Kwai Chung, Hong Kong
| | - V Y M Ma
- COC Pharmaceutical Service - Oncology Working Group, Hospital Authority, Kowloon, Hong Kong.,Department of Pharmacy, Pamela Youde Nethersole Eastern Hospital, Chai Wan, Hong Kong
| | - A Yeung
- Department of Pharmacy, Pamela Youde Nethersole Eastern Hospital, Chai Wan, Hong Kong
| | - C H Y Chin
- Department of Pharmacy, Pamela Youde Nethersole Eastern Hospital, Chai Wan, Hong Kong
| | - M W Kwan
- Department of Pharmacy, Queen Elizabeth Hospital, Kowloon, Hong Kong
| | - H T Tsang
- Department of Pharmacy, Queen Elizabeth Hospital, Kowloon, Hong Kong
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17
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Turner MC, Becerra D, Sun Z, Watson J, Leung K, Migaly J, Mantyh CR, Blazer DG. The side of the primary tumor affects overall survival in colon adenocarcinoma: an analysis of the national cancer database. Tech Coloproctol 2019; 23:537-544. [DOI: 10.1007/s10151-019-01997-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 05/02/2019] [Indexed: 12/16/2022]
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18
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Buglione-Corbett R, Deligiannidis KM, Leung K, Zhang N, Lee M, Rosal MC, Moore Simas TA. Expression of inflammatory markers in women with perinatal depressive symptoms. Arch Womens Ment Health 2018; 21:671-679. [PMID: 29603018 DOI: 10.1007/s00737-018-0834-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 03/21/2018] [Indexed: 01/05/2023]
Abstract
Perinatal depression affects 10-20% of women and is associated with poor outcomes for mother and child. Inflammation is associated with depression in non-pregnant adults. Perinatal depression and inflammation in pregnancy are independently associated with morbidities including obesity, gestational diabetes, preeclampsia, and preterm birth. The role of inflammation in perinatal depression has received little attention. We hypothesized an association between self-reported perinatal depressive symptoms and serum inflammatory biomarkers TNF-α, IL-6, IL-1β, and CRP. 110 healthy gravidas were recruited in third trimester from an academic medical center, with a baseline study visit at a mean of 32.5 (SD ± 1.8) weeks gestational age. Sixty-three participants completed the Edinburgh Postnatal Depression Scale (EPDS) and provided demographic information and serum samples upon enrollment and at 3 and 6 months postpartum. Serum inflammatory markers were quantified by multiplex array. Multiple linear mixed effects models were used to evaluate trends of biomarkers with the EPDS score in the third trimester of pregnancy and the postpartum period. Elevated serum TNF-α was associated with lower EPDS total score (β = - 0.90, p = 0.046) after adjusting for demographics and medication use. In contrast, IL-6, CRP, and IL-1β did not demonstrate statistically significant associations with depressive symptoms by the EPDS in either crude or adjusted models. Study findings showed no association or an inverse (TNF-α) association between inflammatory markers and perinatal depressive symptoms. Relevant literature evaluating a role for inflammation in depression in the unique context of pregnancy is both limited and inconsistent, and further exploration is merited.
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Affiliation(s)
- R Buglione-Corbett
- Department of Obstetrics and Gynecology, University of Massachusetts Medical School/UMass Memorial Health Care, 119 Belmont Street, Worcester, MA, 01605, USA.
| | - K M Deligiannidis
- Department of Obstetrics and Gynecology, University of Massachusetts Medical School/UMass Memorial Health Care, 119 Belmont Street, Worcester, MA, 01605, USA
- Department of Psychiatry, University of Massachusetts Medical School, Worcester, MA, 01655, USA
| | - K Leung
- Department of Obstetrics and Gynecology, University of Massachusetts Medical School/UMass Memorial Health Care, 119 Belmont Street, Worcester, MA, 01605, USA
| | - N Zhang
- Department of Pediatrics, University of Massachusetts Medical School, Worcester, MA, 01655, USA
| | - M Lee
- Department of Pediatrics, University of Massachusetts Medical School, Worcester, MA, 01655, USA
| | - M C Rosal
- Department of Medicine, Division of Preventative and Behavioral Medicine, University of Massachusetts Medical School, Worcester, MA, 01655, USA
| | - T A Moore Simas
- Department of Obstetrics and Gynecology, University of Massachusetts Medical School/UMass Memorial Health Care, 119 Belmont Street, Worcester, MA, 01605, USA
- Department of Psychiatry, University of Massachusetts Medical School, Worcester, MA, 01655, USA
- Department of Pediatrics, University of Massachusetts Medical School, Worcester, MA, 01655, USA
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19
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Leung K, Khan U, McCurdy J, James PD. A208 OPTIMIZING THE UTILITY OF CT ENTEROGRAPHY FOR THE EVALUATION OF OBSCURE GASTROINTESTINAL BLEEDING: A NOVEL HIGHLY SENSITIVE CLINICAL PREDICTION TOOL. J Can Assoc Gastroenterol 2018. [DOI: 10.1093/jcag/gwy009.208] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- K Leung
- Internal Medicine, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada
| | - U Khan
- Internal Medicine, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada
| | - J McCurdy
- Internal Medicine, The Ottawa Hospital, University of Ottawa, Ottawa, ON, Canada
| | - P D James
- Department of Medicine, University Health Network, University of Toronto, Toronto, ON, Canada
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Abstract
Methadone overdose is expected to result in intoxication simulating the other opioids. We report a case of hypoglycaemia following accidental methadone ingestion. A 21-year-old woman presented to a local accident and emergency department 10 hours after ingestion of 800 mg of methadone. She was found to have coma, respiratory suppression, hypotension, prolonged QTc and hypoglycaemia. The hypoglycaemia was reversed by dextrose replacement. The patient required intubation and inotropic support because of cardio-respiratory instability. She eventually recovered without consequence. To date, this is the first reported case of methadone overdose induced hypoglycaemia.
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Affiliation(s)
| | | | | | - OF Wong
- Tuen Mun Hospital, Department of Anaesthesia and Intensive Care, Tsing Chung Koon Road, Tuen Mun, N.T., Hong Kong
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21
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Leung KL, Lui CT, Cheung KH, Tsui KL, Tang YH. Outcome and Prognostic Factors of Patients in Out-Of-Hospital Cardiac Arrests Presenting with Non-Shockable Rhythm in Hong Kong. HONG KONG J EMERG ME 2017. [DOI: 10.1177/102490791201900102] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Objective To obtain the recent local epidemiological data and evaluate factors associated with outcomes of adult patients in non-traumatic non-shockable out-of-hospital-cardiac-arrest (OHCA) in Hong Kong. Methods It was a cross-sectional study lasting for nine months (from July 2009 to March 2010) in two emergency departments (ED) which served a population of 1.1 million. All non-traumatic OHCA patients aged equal or greater than 18 years presented with non-shockable cardiac rhythms to ED without postmortem changes were included. The pre-hospital factors, managements and outcomes were recorded in a standardised data entry form at the time of patient consultation. Logistic regression was used to evaluate the relationship between survival to admission (STA) and various prognostic factors. Results A total of 348 patients fulfilled the inclusion criteria. The mean age was 75.9 years old. Overall, there were 61 patients (17.5%) with restoration of spontaneous circulation and 58 patients (16.7%) had STA. The survival to hospital discharge (STD) rate was 0.86% (3 patients). Factors independently associated with better prognosis in terms of STA were initial pulseless electrical activity arrest (PEA) rhythm in ED (OR=4.72, 95% CI 2.30-9.69), witnessed arrest (OR=8.00, 95% CI 3.38-18.96) and non-cardiac cause of arrest (OR=2.17, 95% CI 1.00-4.67). Conclusion STA for adults presenting with non-traumatic non-shockable OHCA in our centre is 16.7%. Witnessed non-shockable OHCA patients presenting with initial PEA arrest rhythm and with a presumed non-cardiac in etiology are significantly associated with higher STA rate.
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Affiliation(s)
- KL Leung
- Tuen Mun Hospital, Accident and Emergency Department, Tsing Chung Koon Road, Tuen Mun, New Territories, Hong Kong Leung Kwong Leung, MBChB; Lui Chun Tat, MBBS(HK), FHKCEM, FHKAM(Emeregncy Medicine); Tsui Kwok Leung, FRCSEd, FHKCEM, FHKAM(Emergency Medicine); Tang Yiu Hang, FRCSEd, FHKCEM, FHKAM(Emergency Medicine)
| | - CT Lui
- Tuen Mun Hospital, Accident and Emergency Department, Tsing Chung Koon Road, Tuen Mun, New Territories, Hong Kong Leung Kwong Leung, MBChB; Lui Chun Tat, MBBS(HK), FHKCEM, FHKAM(Emeregncy Medicine); Tsui Kwok Leung, FRCSEd, FHKCEM, FHKAM(Emergency Medicine); Tang Yiu Hang, FRCSEd, FHKCEM, FHKAM(Emergency Medicine)
| | | | - KL Tsui
- Tuen Mun Hospital, Accident and Emergency Department, Tsing Chung Koon Road, Tuen Mun, New Territories, Hong Kong Leung Kwong Leung, MBChB; Lui Chun Tat, MBBS(HK), FHKCEM, FHKAM(Emeregncy Medicine); Tsui Kwok Leung, FRCSEd, FHKCEM, FHKAM(Emergency Medicine); Tang Yiu Hang, FRCSEd, FHKCEM, FHKAM(Emergency Medicine)
| | - YH Tang
- Tuen Mun Hospital, Accident and Emergency Department, Tsing Chung Koon Road, Tuen Mun, New Territories, Hong Kong Leung Kwong Leung, MBChB; Lui Chun Tat, MBBS(HK), FHKCEM, FHKAM(Emeregncy Medicine); Tsui Kwok Leung, FRCSEd, FHKCEM, FHKAM(Emergency Medicine); Tang Yiu Hang, FRCSEd, FHKCEM, FHKAM(Emergency Medicine)
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Moore Simas TA, Waring ME, Callaghan K, Leung K, Ward Harvey M, Buabbud A, Chasan-Taber L. Weight gain in early pregnancy and risk of gestational diabetes mellitus among Latinas. Diabetes Metab 2017; 45:26-31. [PMID: 29129541 DOI: 10.1016/j.diabet.2017.10.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 10/09/2017] [Accepted: 10/17/2017] [Indexed: 01/15/2023]
Abstract
AIM To evaluate the association between gestational weight gain (GWG) in early pregnancy and incidence of abnormal glucose tolerance (AGT) and gestational diabetes mellitus (GDM) among Latinas. METHODS We conducted a retrospective cohort study of 2039 Latinas using pooled data from two medical centres in Massachusetts. Gestational weights were abstracted from medical records and GWG was categorized as low, appropriate and excessive according to 2009 Institute of Medicine Guidelines. Diagnosis of AGT and GDM was confirmed by study obstetricians. RESULTS A total of 143 women (7.0%) were diagnosed with GDM and 354 (17.4%) with AGT. After adjusting for age and study site, women with low GWG up to the time of GDM screen had a lower odds of GDM (OR: 0.51, 95% CI: 0.29-0.92). Among overweight women, women with excessive first-trimester GWG had 2-fold higher odds of AGT (OR: 1.96, 95% CI: 1.17-3.30) and GDM (OR: 2.07, 95% CI: 1.04-4.12) compared to those with appropriate GWG; however, these findings were not significant among normal weight or obese women. CONCLUSION Among Latinas, low GWG up to the time of GDM screen was associated with lower odds of AGT and GDM, while excessive GWG among overweight women was associated with higher odds. Findings highlight need for interventions in early pregnancy to help women meet GWG guidelines and to moderate GWG among overweight Latinas.
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Affiliation(s)
- T A Moore Simas
- Department of Obstetrics & Gynecology, University of Massachusetts Medical School/UMass Memorial Health Care, Worcester, MA 01605, United States; Department of Pediatrics, University of Massachusetts Medical School, Worcester, MA 01605, United States
| | - M E Waring
- Department of Obstetrics & Gynecology, University of Massachusetts Medical School/UMass Memorial Health Care, Worcester, MA 01605, United States; Division of Epidemiology of Chronic Diseases and Vulnerable Populations, Department of Quantitative Health Sciences, University of Massachusetts Medical School, Worcester, MA 01605, United States
| | - K Callaghan
- Department of Obstetrics & Gynecology, University of Massachusetts Medical School/UMass Memorial Health Care, Worcester, MA 01605, United States
| | - K Leung
- Department of Obstetrics & Gynecology, University of Massachusetts Medical School/UMass Memorial Health Care, Worcester, MA 01605, United States
| | - M Ward Harvey
- 401 Arnold House, Department of Biostatistics & Epidemiology, School of Public Health & Health Sciences, University of Massachusetts, 715, North Pleasant Street, Amherst, MA 01003, United States
| | - A Buabbud
- Department of Obstetrics & Gynecology, University of Massachusetts Medical School/UMass Memorial Health Care, Worcester, MA 01605, United States
| | - L Chasan-Taber
- 401 Arnold House, Department of Biostatistics & Epidemiology, School of Public Health & Health Sciences, University of Massachusetts, 715, North Pleasant Street, Amherst, MA 01003, United States.
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Jorgensen E, Li A, Modest A, Leung K, Simas Moore T, Hur HC. Impact of Mode of Incision on Venous Thromboembolic Events After Hysterectomy and Myomectomy. J Minim Invasive Gynecol 2017. [DOI: 10.1016/j.jmig.2017.08.066] [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: 11/30/2022]
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24
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Shum C, Leung K, Kwan Y, Mok C. GLYCEMIC CONTROL AND CLINICAL OUTCOMES IN INSTITUTIONALIZED DIABETIC OLDER ADULTS. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.1574] [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: 11/14/2022] Open
Affiliation(s)
- C. Shum
- Department of Medicine and Geriatrics, Tuen Mun Hospital, Hong Kong, Hong Kong
| | - K. Leung
- Department of Medicine and Geriatrics, Tuen Mun Hospital, Hong Kong, Hong Kong
| | - Y. Kwan
- Department of Medicine and Geriatrics, Tuen Mun Hospital, Hong Kong, Hong Kong
| | - C. Mok
- Department of Medicine and Geriatrics, Tuen Mun Hospital, Hong Kong, Hong Kong
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Tyack Z, Simons M, Kimble RM, Muller MJ, Leung K. The reproducibility and clinical utility of the 3D camera for measuring scar height, with a protocol for administration. Skin Res Technol 2017; 23:463-470. [PMID: 28271550 DOI: 10.1111/srt.12357] [Citation(s) in RCA: 5] [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] [Subscribe] [Scholar Register] [Accepted: 01/21/2017] [Indexed: 12/01/2022]
Abstract
BACKGROUND This study aimed to determine the reproducibility and clinical utility of a 3D camera for measuring burn scar height in adults. METHODS Participants from a larger prospective longitudinal study were included. Reproducibility data were collected using an immediate test-retest interval and a 1-2 week test-retest interval and included reliability and agreement. The LifeViz™ 3D camera was used to measure scar height. Reproducibility was tested using the Intraclass Correlation Coefficient (ICC), percentage agreement within 1 mm between test and retest, standard error of measurement, smallest detectable change (SDC) and Bland Altman limits of agreement. RESULTS Burn scar images from 55 adult participants were included. Intra-rater reliability was acceptable using an immediate retest interval (maximum and minimum height ICC=0.85, 0.86 respectively). Agreement using an immediate retest interval was borderline acceptable (maximum and minimum height SDC=1.11, 0.69 respectively) to detect changes of close to 1 mm. Reproducibility was largely not acceptable using a 1-2 week test-retest interval (eg, maximum and minimum height ICC=0.34, 0.68 respectively; maximum and minimum height SDC=2.66, 1.16). The clinical utility of the camera was supported for scars over relatively flat areas and well-defined border margins. A protocol for administration of the camera was developed. CONCLUSION The 3D camera appears capable of detecting gross changes or differences in scar height above the normal skin surface, in adults with scars over relatively flat areas and well-defined border margins. However, further testing of reproducibility using a shorter test-retest interval than 1-2 week retest is recommended to confirm the suitability of the device for measuring changes or differences in scar height.
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Affiliation(s)
- Z Tyack
- Centre for Children's Burns and Trauma Research, Level 7, Children's Health Research Centre, The University of Queensland, South Brisbane, QLD, Australia.,School of Allied Health, Australian Catholic University, Banyo, QLD, Australia
| | - M Simons
- Centre for Children's Burns and Trauma Research, Level 7, Children's Health Research Centre, The University of Queensland, South Brisbane, QLD, Australia.,Department of Occupational Therapy, Lady Cilento Children's Hospital, South Brisbane, QLD, Australia
| | - R M Kimble
- Centre for Children's Burns and Trauma Research, Level 7, Children's Health Research Centre, The University of Queensland, South Brisbane, QLD, Australia.,Department of Paediatric Surgery, Urology, Neonatal Surgery, Burns and Trauma, Lady Cilento Children's Hospital, Brisbane, QLD, Australia.,School of Medicine, The University of Queensland, St Lucia, QLD, Australia
| | - M J Muller
- Royal Brisbane and Women's Hospital, Professor Stewart Pegg Adult Burns Unit, Herston, QLD, Australia.,Burns Trauma Critical Care Research Centre, The University of Queensland, Royal Brisbane and Women's Hospital, Herston, QLD, Australia
| | - K Leung
- Centre for Children's Burns and Trauma Research, Level 7, Children's Health Research Centre, The University of Queensland, South Brisbane, QLD, Australia.,Department of Paediatric Surgery, Urology, Neonatal Surgery, Burns and Trauma, Lady Cilento Children's Hospital, Brisbane, QLD, Australia.,School of Medicine, The University of Queensland, St Lucia, QLD, Australia
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Duenas O, Sullivan G, Healy D, Leung K, Billiar K, Flynn M. 27: Knot integrity of sutures used for reconstructive pelvic floor procedures. Am J Obstet Gynecol 2017. [DOI: 10.1016/j.ajog.2016.12.074] [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: 10/20/2022]
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27
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Leung K. Book Reviews. Journal of Cross-Cultural Psychology 2016. [DOI: 10.1177/0022022193241012] [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: 11/17/2022]
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Leung K, Wong M, Ng Y, Lee S, Ming Chun Chau R, Lee F. TU-H-CAMPUS-IeP1-03: Comparison of Monte Carlo Simulation and Conversion Factor Based Method On Estimation of Effective Dose in Pediatric Patients Undergoing Interventional Cardiac Procedures. Med Phys 2016. [DOI: 10.1118/1.4957666] [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: 11/07/2022] Open
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Lee V, Huang X, Wong M, Chan M, Chui E, Cheung S, Leung R, Lee K, Law G, Leung K, Tung S, Kwong D. SU-G-TeP2-10: Feasibility of Newly Designed Applicator for High Dose Rate Brachytherapy Treatment of Patients with Vaginal Vault Recurrence. Med Phys 2016. [DOI: 10.1118/1.4957045] [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: 11/07/2022] Open
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Hanley P, Keller M, Martin Manso M, Martinez C, Leung K, Cruz C, Barese C, McCormack S, Luo M, Krance R, Jacobsohn D, Rooney C, Heslop H, Shpall E, Bollard C. A Phase 1 Perspective: Multivirus-Specific T Cells From Both Cord Blood and Bone Marrow Transplant Donors. Cytotherapy 2016. [DOI: 10.1016/j.jcyt.2016.03.021] [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: 10/21/2022]
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Sullivan G, Duenas O, Leung K, Flynn M. 33: The negative predictive value of preoperative urodynamics for post-operative stress urinary incontinence in patients undergoing prolapse repair. Am J Obstet Gynecol 2016. [DOI: 10.1016/j.ajog.2016.01.064] [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: 11/29/2022]
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Li A, Modest AM, Cohen MG, Moore Simas TA, Leung K, Perez Peralta J, Hur HC. Incidence of Venous Thrombotic Events Following Gynecologic Surgery. J Minim Invasive Gynecol 2015; 22:S61. [DOI: 10.1016/j.jmig.2015.08.163] [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: 11/29/2022]
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Lopez‐Cepero A, Leung K, Corvera S, Moore T, Rosal MC. Impact of Eating Behaviors and Cravings on Gestational Weight Gain and Diet. FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.900.19] [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: 11/11/2022]
Affiliation(s)
| | - K Leung
- Medical School University of MassachusettsUnited States
| | - S Corvera
- Medical School University of MassachusettsUnited States
| | - T Moore
- Medical School University of MassachusettsUnited States
| | - MC Rosal
- Medical School University of MassachusettsUnited States
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Lopez‐Cepero A, Leung K, Corvera S, Moore T, Rosal MC. Association Between Obstetric Provider's Advice and Gestational Weight Gain in a Diverse Sample of Women. FASEB J 2015. [DOI: 10.1096/fasebj.29.1_supplement.590.13] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - K Leung
- Medical School UMassUnited States
| | | | - T Moore
- Medical School UMassUnited States
| | - MC Rosal
- Medical School UMassUnited States
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Li A, Simas TAM, Modest AM, Leung K, Amir N, Bannon A, Hur H. Incidence of Venous Thrombotic Events following Gynecologic Surgery. J Minim Invasive Gynecol 2015. [DOI: 10.1016/j.jmig.2014.12.082] [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: 11/25/2022]
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Boutselakis C, Forbes SA, Gunasekaran P, Jia M, Beare D, Bindal N, Kok CY, Leung K, Minjie D, Shepherd R, Bamford S, Ward S, Cole C, Teague JW, Stratton M, Campbell P, McDermott U. Abstract 5326: COSMIC: Enhancing the world's knowledge of somatic mutations in human cancer. Cancer Res 2014. [DOI: 10.1158/1538-7445.am2014-5326] [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] [Indexed: 11/16/2022]
Abstract
Abstract
COSMIC, the Catalogue Of Somatic Mutations In Cancer (http://cancer.sanger.ac.uk) is the world's largest and most comprehensive online resource for exploring the impact of somatic mutations in human cancer. Now running for over 10 years, the 67th release (Oct 2013) describes 1592109 mutations in 947213 tumour samples across 25606 genes. This information is curated manually from the scientific literature, and automatically from genome resequencing consortium data portals. Full curation of the scientific literature provides in-depth understanding of the impact that each gene has in human cancer, and this has been achieved for 127 point-mutated cancer genes, and 185 fusion gene pairs. Curated genes are selected from the Cancer Gene Census (http://cancer.sanger.ac.uk/census), a listing of all genes with substantial evidence implicating them in cancer promotion, currently numbering 513 and updated frequently.
The mutations discovered in the re-sequencing of over 8000 tumour genomes are now present in COSMIC (viewable in isolation from the genic curations, http://cancer.sanger.ac.uk/wgs). In addition, the Sanger has now fully exome sequenced 1015 common cancer cell lines, identifying 1146874 coding mutations annotated for functional significance, and this is available exclusively in COSMIC at (http://cancer.sanger.ac.uk/cell_lines). While COSMIC has focused on point mutations and gene fusions, many other mutation mechanisms cause oncogenesis and these are now being integrated. The 67th COSMIC release includes copy number mutations integrated into the database and major web page views. To allow easy graphical examination of this data, copy number information was reduced to ‘gain’ and ‘loss’ annotations for inclusion in histograms and tables, with much more precise detail available with a further click. Copy number data is available in detail for every gene in COSMIC, and also for every tissue. Exploring cancer via COSMIC’s Cancer Browser (http://cancer.sanger.ac.uk/cosmic/browse/tissue), results not just in a plot of the most mutated genes, but now also a circular genome plot summarizing the copy number gains and losses across all the samples from that tumour type, all explorable in more detail via clicks on the pictures.
As the genomic data increases in COSMIC, it is becoming more important to qualitatively annotate the information, indicating which is more important or significant to oncogenesis. We are now building systems to better highlight known or putative functional mutations, improving the signal-to-noise ratio of cancer genome resequencing.
Citation Format: C Boutselakis, S A. Forbes, P Gunasekaran, M Jia, D Beare, N Bindal, C Y. Kok, K Leung, D Minjie, R Shepherd, S Bamford, S Ward, C Cole, J W. Teague, M Stratton, P Campbell, U McDermott. COSMIC: Enhancing the world's knowledge of somatic mutations in human cancer. [abstract]. In: Proceedings of the 105th Annual Meeting of the American Association for Cancer Research; 2014 Apr 5-9; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2014;74(19 Suppl):Abstract nr 5326. doi:10.1158/1538-7445.AM2014-5326
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Affiliation(s)
- C Boutselakis
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - S A. Forbes
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - P Gunasekaran
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - M Jia
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - D Beare
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - N Bindal
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - C Y. Kok
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - K Leung
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - D Minjie
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - R Shepherd
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - S Bamford
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - S Ward
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - C Cole
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - J W. Teague
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - M Stratton
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - P Campbell
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | - U McDermott
- The Wellcome Trust Sanger Institute, Cambridge, United Kingdom
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Slattery C, Beck J, Harper L, Adamson G, Abdi Z, Uphill J, Campbell T, Druyeh R, Mahoney C, Rohrer J, Kenny J, Lowe J, Leung K, Barnes J, Clegg S, Blair M, Nicholas J, Guerreiro R, Rowe J, Ponto C, Zerr I, Kretzschmar H, Gambetti P, Crutch S, Warren J, Rossor M, Fox N, Collinge J, Schott J, Mead S. TREM2 VARIANTS INCREASE RISK OF TYPICAL EARLY-ONSET ALZHEIMER'S DISEASE BUT NOT OF PRION OR FRONTOTEMPORAL DEMENTIA. Journal of Neurology, Neurosurgery & Psychiatry 2014. [DOI: 10.1136/jnnp-2014-308883.7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Tam LS, Shang Q, Li E, Wong P, Zhu T, Li T, Pui M, Leung K, Kun E, Yu CM. SAT0397 Serum Apolipoprotein B is Associated with Increased Risk of the Presence and Progression of Carotid Atherosclerosis in Patients with Psoriatic Arthritis: Table 1. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.3137] [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: 11/04/2022]
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Leung H, Mak H, Leung M, Leung KL, Kwan P, Wong KS. Neuroeconomics of health care financing options: willingness to pay and save. Hong Kong Med J 2014; 20:8-10. [PMID: 25001028] [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: 06/03/2023] Open
Affiliation(s)
- H Leung
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong
| | - H Mak
- Department of Diagnostic Radiology, The University of Hong Kong
| | - M Leung
- Department of Economics, The Chinese University of Hong Kong
| | - K L Leung
- Private medical practitioner, Hong Kong
| | - P Kwan
- University of Melbourne, Australia
| | - K S Wong
- Department of Medicine and Therapeutics, The Chinese University of Hong Kong
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Papadopoulou A, Katari U, Gerdemann U, Tzannou I, Martinez C, Leung K, Carrum G, Gee A, Vera J, Krance R, Brenner M, Rooney C, Heslop H, Leen A. Safety and clinical efficacy of rapidly-generated virus-specific T cells with activity against adv, EBV, CMV, HHV6 and BK virus administered after allogeneic hematopoietic stem cell transplant. Cytotherapy 2014. [DOI: 10.1016/j.jcyt.2014.01.014] [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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Coles SJ, Ellis AL, Leung K, Sarson J, Threlfall TL, Tizzard GJ. Relationships between the racemic structures of substituted mandelic acids containing 8- and 10-membered hydrogen bonded dimer rings. CrystEngComm 2014. [DOI: 10.1039/c4ce01832j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The structures of 27 monosubstituted mandelic acids, including several of their polymorphs, plus unsubstituted mandelic acid itself (two polymorphs) are investigated for structural similarity.
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Affiliation(s)
- S. J. Coles
- Chemistry
- Faculty of Natural and Environmental Sciences
- University of Southampton
- Southampton, UK
| | - A. L. Ellis
- Chemistry
- Faculty of Natural and Environmental Sciences
- University of Southampton
- Southampton, UK
| | - K. Leung
- Chemistry
- Faculty of Natural and Environmental Sciences
- University of Southampton
- Southampton, UK
| | - J. Sarson
- Chemistry
- Faculty of Natural and Environmental Sciences
- University of Southampton
- Southampton, UK
| | - T. L. Threlfall
- Chemistry
- Faculty of Natural and Environmental Sciences
- University of Southampton
- Southampton, UK
| | - G. J. Tizzard
- Chemistry
- Faculty of Natural and Environmental Sciences
- University of Southampton
- Southampton, UK
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Yang B, Leung K, Cheung K, Yu S, Geng H, Lam W, Lo S, Chiu T. A Comparison of the Dosimetric Properties of a Plastic Scintillator-CCD and a Fluorescent Screen-CCD System in QA of Radiation Therapy Beams. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1535] [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: 10/26/2022]
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Leung KL, Yip CW, Tang HS, Lai YW, Lam TK, Kam KM. A pilot external quality assurance programme for line-probe assay detection of anti-tuberculosis drug resistance. Int J Tuberc Lung Dis 2012; 17:262-6. [PMID: 23244351 DOI: 10.5588/ijtld.12.0533] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Multidrug-resistant tuberculosis (MDR-TB; resistance to isoniazid and rifampicin) is difficult to detect and control. Line-probe assays (LiPA) are widely used for the rapid detection of MDR-TB. OBJECTIVE To ensure the quality of the test, a pilot external quality assurance (EQA) programme was initiated to assess the feasibility of running such a programme and the possibility of improving the proficiency of TB laboratories in performing the test. DESIGN Prepared filter-paper-based Mycobacterium tuberculosis DNA samples were shipped to participant laboratories for LiPA EQA. The tests were performed blind, and the results were returned to the organising laboratory for comparison and analysis. RESULTS A total of four rounds of EQA samples were dispatched to five laboratories in four countries. Overall inter- and intra-laboratory reproducibility was respectively 97% and 96%. The strengths and weaknesses of the participant laboratories in performing the test were discussed. CONCLUSION A LiPA EQA programme can ensure quality and improve the performance of TB laboratories. This is a critical step during the initial stages at the time of setting up this method of testing.
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Affiliation(s)
- K L Leung
- Tuberculosis Reference Laboratory, Public Health Laboratory Services Branch, Centre for Health Protection, Department of Health, Hong Kong SAR, China
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Chan S, Fung M, Mak N, Leung K. Involvement of interleukin-1 in the differentiation-inducing activity of tumor necrosis factor-alpha on a murine myeloid leukemia (WEHI-3B JCS). Int J Oncol 2012; 10:821-6. [PMID: 21533451 DOI: 10.3892/ijo.10.4.821] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
We have shown previously that tumor necrosis factor-alpha (TNF-alpha) inhibits the growth and induces the differentiation of a murine myelomonocytic leukemia (WEHI-3B JCS cells) into macrophage-like cells. In this study, using reverse transcription polymerase chain reaction, we found that both endogenous interleukin-1 alpha and beta (IL-1 alpha, IL-1 beta) mRNA were up-regulated upon TNF-alpha induction. Exogenous IL-1 alpha and IL-1 beta also inhibited the growth as well as induced the differentiation of JCS cells, with IL-1 beta exerting a greater growth-inhibitory effect. Neutralizing anti-IL-1 alpha, anti-IL-1 beta and anti-TNF-alpha antibodies were further used to elucidate the role of IL-1 alpha, IL-1 beta and TNF-alpha in JCS cell differentiation. The results show that the IL-1 alpha-induced monocytic differentiation of JCS cells was effectively blocked by anti-IL-1 beta as well as anti-IL-1 beta antibodies and to a lesser extent by anti-TNF-alpha antibody. In contrast, the differentiation-inducing effect of IL-1 beta on JCS cells was only blocked by anti-IL-1 beta antibody but not by anti-IL-1 alpha or anti-TNF-alpha antibody. Finally, the TNF-alpha-induced monocytic differentiation of JCS cells was significantly blocked by anti-TNF-alpha and to a lesser extent by anti-IL-1 alpha and anti-IL-1 beta antibodies. Collectively, our results suggest that IL-1 beta alone may directly trigger JCS cell differentiation whereas the differentiation-inducing effect of IL-1 alpha may be via the endogenous production of IL-1 beta and/or TNF-alpha. In addition, IL-1 alpha and IL-1 beta may be involved, at least in part, in TNF-alpha-induced monocytic differentiation of the JCS leukemia cells.
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Affiliation(s)
- S Chan
- CHINESE UNIV HONG KONG,DEPT BIOCHEM,SHATIN,NT,HONG KONG. CHINESE UNIV HONG KONG,DEPT BIOCHEM,SHATIN,NT,HONG KONG. HONG KONG BAPTIST UNIV,DEPT BIOL,KOWLOON,HONG KONG
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Leung K, Cheung C, Lam W, Yu S, Chua T. OC-0390 COMPARISON OF TWO ATLAS SELECTION STRATEGIES FOR SEGMENTATION OF HEAD AND NECK CT SCANS. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)70729-6] [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: 10/28/2022]
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Marie-Lucile F, Laure-Helene N, Yosr C, Anne M, Fadi F, Levi C, Levi C, Meas-Yedid V, Daniliuc C, Karras A, Olivo-Marin JC, Mouthon L, Guiard E, Roland M, Guillevin L, Jacquot C, Nochy D, Thervet E, Chen Q, Skerka C, Uzonyi B, Lindner S, Licht C, Hoppe B, Riedl M, Kirschfink M, Habbich S, Wolf G, Strain L, Goodship TH, Zipfel PF, Kfoury H, Alsuwaida A, Alsaad K, Alhejaili F, Alghonaim M, Alwakeel J, Husain S, Aloudah N, Besso L, Besso L, Tamagnone M, Daidola G, Burdese M, Repetto L, Pasquale G, Colla L, Biancone L, Stratta P, Segoloni GP, Bacalja J, Bauer Segvic AM, Bulimbasic S, Pacic A, Knotek M, Sabljar Matovinovic M, Galesic K, Galesic Ljubanovic D, Zakharova E, Stolyarevich E, Vorobjova O, Tamouza H, Chemouny JM, Flamant M, Raskova Kafkova L, Demion M, Laurent M, Walker F, Julian BA, Tissandie E, Tiwari MK, Novak J, Camara NO, Benhamou M, Vrtovsnik F, Monteiro RC, Moura IC, Samavat S, Ahmadpoor P, Torbati P, Ghaderi R, Poorrezagholi F, Samadian F, Nafar M, MII A, MII A, Shimizu A, Kaneko T, Yasuda F, Fukui M, Masuda Y, Iino Y, Katayama Y, Muller C, Markovic-Lipkovski J, Simic-Ogrizovic S, Naumovic R, Cirovic S, Mitrovic D, Muller G, Wozniak A, Janicka-Jedynska M, Zurawski J, Kaczmarek E, Zachwieja J, Khilji S, Khilji S, Dorman T, O'kelly P, Lampty L, Leung K, Shadivan A, Varghese C, Walshe J, Saito T, Kawano M, Saeki T, Mizushima I, Yamaguchi Y, Imai N, Nakashima H, Umehara H, Shvetsov M, Popova O, Chebotareva N, Ivanov A, Bobkova I, Cremasco D, Ceol M, Peruzzi L, Mazzucco G, Giuseppina M, Vezzoli G, Cristofaro R, D'angelo A, Anglani F, Del Prete D, Coppolino G, Comi N, Bolignano D, Piraina V, Talarico R, Colombo A, Lucisano G, Fuiano G, Bernich P, Lupo A, Of Renal Biopsies TR, Rastaldi MP, Jercan OC, Messa P, Alexandru D, Mogoanta L, Jercan OC, Shvetsov M, Ivanov A, Uribe Villegas V, Popova O. Renal histopathology. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs242] [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: 11/13/2022] Open
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Cheung C, Leung K, Lam W, Yu S, Chua T. PO-0846 THE APPLICATION OF SPECTRAL CT IMAGING IN AUTO-CONTOURING OF HEAD AND NECK CASES. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)71179-9] [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: 10/28/2022]
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Hon SSF, Ng SSM, Chiu PWY, Chan FKL, Ng EKW, Li JCM, Lee JFY, Leung KL. Endoscopic submucosal dissection versus local excision for early rectal neoplasms: a comparative study. Surg Endosc 2011; 25:3923-7. [PMID: 21789647 DOI: 10.1007/s00464-011-1821-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2011] [Accepted: 06/22/2011] [Indexed: 12/14/2022]
Abstract
BACKGROUND Transanal local excision (LE) is a well-established treatment option for early rectal neoplasms not amenable to complete colonoscopic removal. Endoscopic submucosal dissection (ESD) has been introduced recently as a novel procedure that enables en bloc resection of large rectal neoplasms. To date, no report comparing the two approaches can be found in the literature. This study aimed to compare the short-term clinical outcomes between ESD and LE for early rectal neoplasms. METHODS Between 2007 and 2010, 14 patients with early rectal neoplasms deemed not feasible for en bloc endoscopic resection using conventional techniques underwent ESD. They were compared with a matched cohort of 30 patients who had early rectal neoplasms and underwent LE between 2000 and 2009. Short-term clinical outcomes including postprocedure recovery and morbidity were compared between the two groups. RESULTS The mean lesion size was comparable between the ESD and LE groups (2.9 vs 2.6 cm; P = 0.423), but the mean distance of the lesions from the anal verge was greater in the ESD group (8.6 vs 5.0 cm; P = 0.001). En bloc resection was achieved for 12 patients (85.7%) in the ESD group and for all the patients in the LE group. The ESD group exhibited a trend toward a longer operative time (77.5 vs 50.0 min; P = 0.081) but lower morbidity (7.1 vs 33.3%; P = 0.076). The time to full ambulation was shorter in the ESD group (0 vs 1 day; P = 0.005), but the hospital stay was similar in the two groups (2.5 vs 4.0 days; P = 0.129). CONCLUSION For the treatment of early rectal neoplasms, ESD offers better short-term clinical outcomes in terms of faster recovery and possibly lower morbidity than LE. Further prospective studies with a larger sample are needed to validate the benefits of rectal ESD.
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Affiliation(s)
- Sophie S F Hon
- Department of Surgery, The Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, Hong Kong SAR, China.
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So RHY, Leung NM, Horner AB, Braasch J, Leung KL. Effects of spectral manipulation on nonindividualized head-related transfer functions (HRTFs). Hum Factors 2011; 53:271-283. [PMID: 21830512 DOI: 10.1177/0018720811406883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND Directional sounds simulated using nonindividualized head-related transfer functions (HRTFs) often result in front-back confusion. OBJECTIVE This study was designed to examine how manipulating these nonindividualized HRTF spectra can reduce front-back confusion in headphone-simulated directional sounds. METHOD HRTFs of six ear-level directions were studied (angles of 0 degrees, 45 degrees, 135 degrees, 180 degrees, 225 degrees, and 315 degrees). The HRTF gains in each of six frequency bands (200 to 690 Hz, 690 to 2400 Hz, 2400 to 6500 Hz, 6500 to 10000 Hz, 10000 to 14000 Hz, and 14000 to 22000 Hz) were amplified or attenuated by 0, 12, or 18 dB. Each manipulated HRTF generated a directional sound stimulus. For this study, 32 participants were invited to localize the randomly ordered stimuli. RESULTS The results indicate that a 12- or 18-dB manipulation of five of the six frequency bands produced significantly better directional accuracy, with significantly less front-back confusion. A reduction of up to 70% in localization error was obtained, along with 66% less front-back confusion. Significant interactions were found between the manipulation level and frequency. CONCLUSION A 12-dB spectral manipulation of selected HRTF frequency bands produces better directional accuracy. APPLICATION The results of this research could be applied to the development of tunable nonindividualized HRTFs for audio products.
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Affiliation(s)
- Richard H Y So
- Hong Kong University of Science and Technology, Hong Kong, People's Republic of China.
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