2.3. Procedures
sleep disorders
In the cross-sectional questionnaire study, the PSQI, SF-36, and RIQ were administered in groups. The PSQI score was applied to screen participants with sleep disorders for the longitudinal intervention study, and 60 of them were randomly assigned to the intervention group and the control group. Besides, the questionnaire's results were taken as pre-test scores. There were no significant differences in PSQI (17.46 ± 2.32 vs. 16.78 ± 3.14), SF-36 (456.64 ± 117.36 vs. 499.85 ± 133.36) and RIQ (1.59 ± 0.51 vs. 1.32 ± 0.57) between the intervention and the control group (