Logistic regression results: odds ratios of prolonged sleep difficulties and 95% confidence intervals.

95%CI, 95% confidence interval; OR, odds ratio
a Model 1, univariate model
b Model 2, multivariate model in which social support was rated dichotomously (having any social support or not)
c Model 3, multivariate model in which social support was categorized into three dimensions
d The odds ratio reflects the change in the odds of sleep difficulties per 10-year increase in age.
e “Other” includes public livelihood assistance, unemployment allowance, and no regular income
Logistic regression results: odds ratios of prolonged sleep difficulties and 95% confidence intervals.