2.4.2. Data from longitudinal interventions
sleep disorders
A 2 (group: intervention group, control group) ×2 (time: pre-test, post-test) two-factor mixed design analysis of variance was used to compare baseline and post-intervention scores on measures of sleep disorders, quality of life and relapse inclination between the intervention and control groups. Furthermore, correlation analysis was used to evaluate the relationships among the changes in PSQI, SF-36 and RIQ in the intervention group before and after the intervention to determine whether all variables altered to the same extent.