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Kai Fun Yu

Publications and source records attributed to Kai Fun Yu.

2 recordsLinked to original sources

A pilot study of vaginal flora changes with randomization to cessation of douching.

OBJECTIVES: The objectives of this study were to determine whether women who douche regularly would enter a randomized trial of douching cessation or continuation, whether they would adhere to the assigned behavior, and whether there was a dramatic impact on vaginal flora. GOAL: The goal of this study was to determine the feasibility of a large, definitive trial of douching cessation. STUDY DESIGN: Women who douched at least weekly and who had either bacterial vaginosis or normal flora by Gram stain were assigned at random either to continue douching or to stop for 8 weeks. Vaginal Gram stains were obtained every 7 days from each woman. RESULTS: Forty-eight women were randomized. Those assigned to continue reported douching during 77% of study weeks; those assigned to stop denied douching in 94% of weeks. No dramatic differences in flora were observed between women in the continue versus stop groups. CONCLUSION: A large randomized trial of douching cessation is feasible.

Bacteria↗

Regression models for unbalanced longitudinal ordinal data: computer software and a simulation study.

A computer program GGOREX in the form of a SAS macro is developed for the analysis of longitudinal ordinal data. It is extended from GEECAT and GEEGOR developed by Williamson, Lipsitz and Kim in their paper in 1999. An illustrative example with some preliminary data from a study conducted by the National Institute of Child Health and Human Development and the University of Alabama at Birmingham is given. Another set of computer programs is developed to make it possible to conduct a simulation study to validate the GGOREX procedure in a finite sample. A simple computer program in FORTRAN using the IMSL software library is developed to solve for the probability distribution of the longitudinal ordinal responses according to the correlation specification.

Computer Simulation↗