Comparison of PSQI total and sub-item scores between the baseline and the end of the treatment period, and comparison of changes in these scores between the discontinued group and the long-term use group from the baseline to the end of the treatment period.

The Wilcoxon signed rank test was used for comparison of the scores between the 2 time points.

The Mann-Whitney U test was used for comparison of the changes in these scores between the 2 groups.

Values are expressed as means ±SD for continuous variables.

*p<0.01;

**p<0.05; PSQI =  Pittsburgh Sleep Quality Index.

Comparison of PSQI total and sub-item scores between the baseline and the end of the treatment period, and comparison of changes in these scores between the discontinued group and the long-term use group from the baseline to the end of the treatment period.