Spss software was used to conduct the analysis. Descriptive stastics were obtained for all variable, incliuding distributions, mean, medians, variances and standard deviations. Comparisons between cases and controls used Chi square test, Fisher's exact test ( for nominal data) or t-test (for continuous variables). Because of the large number of univariate analyses, we subjected the data to futher analyses using the False Discovery rate method. All analyses used a two-tailed alpha(p=0.05) as the level of statistical significance.
This study was approved by the institutional review boards of the Beijing Hui Long Guan Hospital and the Chinese academy of preventive medicine.
Spss software was used to conduct the analysis. Descriptive stastics were obtained for all variable, incliuding distributions, mean, medians, variances and standard deviations. Comparisons between cases and controls used Chi square test, Fisher's exact test ( for nominal data) or t-test (for continuous variables). Because of the large number of univariate analyses, we subjected the data to futher analyses using the False Discovery rate method. All analyses used a two-tailed alpha(p=0.05) as the level of statistical significance.This study was approved by the institutional review boards of the Beijing Hui Long Guan Hospital and the Chinese academy of preventive medicine.
การแปล กรุณารอสักครู่..