Comparison of demographic variables between the discontinued group and the long-term use group.

Values are expressed as means ±SD. The Mann-Whitney U test was used for the comparison of continuous variables between the 2 groups as follows: age, duration of insomnia morbidity, dose of hypnotics, and SDS and PSQI scores. The chi-square test was used for the comparison of categorical variables between the 2 groups as follows: sex, marital status, educational background, occupation, and half-life of hypnotic.ns = not significant; SDS = Zung Self-Rating Depression Scale; PSQI = Pittsburgh Sleep Quality Index.Comparison of demographic variables between the discontinued group and the long-term use group.