Statistic package for social science spss version 23

Data analyses were performed using Statistic Package for Social Science (SPSS) version 23.0 (SPSS Inc., Chicago, Illinois, USA). Normal distributions of continuous variables were checked by one-sample Kolmogorov-Smirnoff test. Independent t-tests, Mann-Whitney U tests and Chi-square tests were used to compare socio-demographic and clinical variables between depression and no depression groups, between insomnia and no insomnia groups, and between no comorbid depression and insomnia and comorbid depression and insomnia groups, respectively. QOL between depression and no depression groups, between insomnia and no insomnia groups, and between comorbid depression and insomnia and no comorbid depression and insomnia groups were compared using analysis of covariance (ANOVA) after controlling for the potentially confounding effects of variables that significantly differed in univariate analyses. Binary logistic regression analyses with the “Enter” method were used to examine the independent correlates of depression, insomnia, and comorbid depression and insomnia, separately. Variables with significant group differences in univariate analyses were entered as independent variables, while depression, insomnia, and comorbid depression and insomnia were dependent variable, separately. All analyses used the two-tailed tests, with the significance of 0.05.