Search Results - "LAM, K.‐F."

A novel method to monitor COVID-19 fatality rate in real-time, a key metric to guide public health policy by Qu, Yuanke, Lee, Chun Yin, Lam, K. F.

“…An accurate estimator of the real-time fatality rate is warranted to monitor the progress of ongoing epidemics, hence facilitating the policy-making process…”
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Survival analysis with change-points in covariate effects by Lee, Chun Yin, Lam, KF

“…We apply a maximal likelihood ratio test for the presence of multiple change-points in the covariate effects based on the Cox regression model. The covariate…”
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A sequential test to compare the real-time fatality rates of a disease among multiple groups with an application to COVID-19 data by Qu, Yuanke, Yin Lee, Chun, Lam, KF

“…Infectious diseases, such as the ongoing COVID-19 pandemic, pose a significant threat to public health globally. Fatality rate serves as a key indicator for…”
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In the determination of weight sets to compute cross-efficiency ratios in DEA by Lam, K F

“…Data envelopment analysis (DEA) measures the production performance of decision-making units (DMUs) which consume multiple inputs and produce multiple outputs…”
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Increased arterial stiffness in patients with psoriasis is associated with active systemic inflammation by Yiu, K-H., Yeung, C-K., Chan, H-T., Wong, R.M.Y., Tam, S., Lam, K-F., Yan, G.H., Yue, W.S., Chan, H.H., Tse, H-F.

“…Summary Background  Psoriasis is associated with premature atherosclerosis although the underlying mechanism remains unclear. Objectives  We sought to…”
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The English and Chinese language versions of the Short Form 12-item Health Survey are equivalent by Fong, Daniel Y T, Wong, Janet Y H, Choi, Edmond P H, Lam, K F, Kwok, C

“…The Short Form 12-item Health Survey (SF-12v2) was originally developed in English, but it is also available in Hong Kong (HK) Chinese. While both language…”
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Longitudinal measurement invariance and explanatory IRT models for adolescents' oral health-related quality of life by Yau, David T W, Wong, May C M, Lam, K F, McGrath, Colman

“…Longitudinal invariance is a perquisite for a valid comparison of oral health-related quality of life (OHRQoL) scores over time. Item response theory (IRT)…”
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Prevalence and extent of calcification over aorta, coronary and carotid arteries in patients with rheumatoid arthritis by Wang, S., Yiu, K.‐H., Mok, M.‐Y., Ooi, G. C., Khong, P.‐L., Mak, K.‐F. H., Lau, C.‐P., LAM, K.‐F., Lau, C.‐S., Tse, H.‐F.

“… Objective.  To evaluate the prevalence and pattern of arterial calcification in patients with rheumatoid arthritis (RA). Background.  Patients with RA are…”
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Prevalence, clinical spectrum and health care utilization of gastro‐oesophageal reflux disease in a Chinese population: a population‐based study by Wong, W. M., Lai, K. C., Lam, K. F., Hui, W. M., Hu, W. H. C., Lam, C. L. K., Xia, H. H. X., Huang, J. Q., Chan, C. K., Lam, S. K., Wong, B. C. Y.

“…Summary Background : Population‐based data on gastro‐oesophageal reflux disease in Chinese are lacking. The prevalence, clinical spectrum and health…”
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Iron supplement in pregnancy and development of gestational diabetes—a randomised placebo‐controlled trial by Chan, KKL, Chan, BCP, Lam, KF, Tam, S, Lao, TT

“…Objective  To test the hypothesis that iron supplement from early pregnancy would increase the risk of gestational diabetes mellitus (GDM). Design  Randomised…”
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Towards an understanding of the effects of operating conditions on separation by microfluidic distillation by Lam, K.F., Sorensen, E., Gavriilidis, A.

“…A parametric study on the separation of an acetone–ethanol mixture using a microfabricated distillation chip, with a microchannel 600 μm wide and 400 mm long,…”
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Antibiotic use: do parents act differently for their children? by Wun, Y T, Lam, T P, Lam, K F, Sun, K S

“…Many children in the community take antibiotics inappropriately. Previous studies comparing parents with other adults suggest that parents are more judicious…”
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A Simple Approach to the Estimation of Incidence Rate Difference by Xu, Ying, Cheung, Y. B., Lam, K. F., Tan, S. H., Milligan, Paul

“…The incidence rate difference (IRD) is a parameter of interest in many medical studies. For example, in vaccine studies, it is interpreted as the…”
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Semiparametric Analysis of Zero‐Inflated Count Data by Lam, K. F, Xue, Hongqi, Bun Cheung, Yin

“…Medical and public health research often involve the analysis of count data that exhibit a substantially large proportion of zeros, such as the number of heart…”
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Sieve Maximum Likelihood Estimator for Semiparametric Regression Models With Current Status Data by Xue, Hongqi, Lam, K. F, Li, Guoying

“…In a randomized controlled clinical trial study where the response variable of interest is the time to occurrence of a certain event, it is often too expensive…”
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Anxiety but not depression determines health care‐seeking behaviour in Chinese patients with dyspepsia and irritable bowel syndrome: a population‐based study by Hu, W. H. C., Wong, W.‐M., Lam, C. L. K., Lam, K. F., Hui, W. M., Lai, K. C., Xia, H. X. H., Lam, S. K., Wong, B. C. Y.

“…Summary Aims : To study the prevalence of dyspepsia and irritable bowel syndrome and the effects of co‐existing anxiety and depression on health care…”
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Health insurance and healthcare utilisation for Shenzhen residents: a tale of registrants and migrants? by Lam, Kelvin K F, Johnston, Janice M

“…Shenzhen's rapid growth and urbanisation has attracted a large, mobile, migrant working population. This article explores health protection through the means…”
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Sample size determination for fold-increase endpoints defined by paired interval-censored data by Xu, Ying, Lam, K. F., Cheung, Yin Bun

“…Medical studies often define binary end-points by comparing the ratio of a pair of measurements at baseline and end-of-study to a clinically meaningful…”
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Evaluation of psychometric properties and differential item functioning of 8-item Child Perceptions Questionnaires using item response theory by Yau, David T W, Wong, May C M, Lam, K F, McGrath, Colman

“…Four-factor structure of the two 8-item short forms of Child Perceptions Questionnaire CPQ11-14 (RSF:8 and ISF:8) has been confirmed. However, the sum scores…”
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Modeling zero-inflated count data using a covariate-dependent random effect model by Wong, Kin-Yau, Lam, K.F.

“…In various medical related researches, excessive zeros, which make the standard Poisson regression model inadequate, often exist in count data. We proposed a…”
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