Effect of restricting bedtime mobile phone use on sleep, arousal, mood, and working memory: A randomized pilot trial
Fig 2
The change in sleep after the intervention.
A, sleep latency at baseline and at the end of intervention. B, sleep duration at baseline and at the end of intervention. C, PSQI scores at baseline and at the end of intervention. Note: PSQI, the Pittsburgh Sleep Quality Index. Intervention group is designated with a white square; control group is designated with a black square. *p<0.05. **p<0.01.