Objective  To observe the effects of sleep restriction therapy (SRT) in patients withinsomnia disorder comorbid to Parkinson's disease.

  Methods  A total of 90 patients with insomnia disorder comorbid to Parkinson's disease were recruited in the study, 4 cases withdrew or lost in follow-up, and 86 cases were finally completed the study. They were randomly divided into treatment group and control group, with 43 cases in each group. Besides the sleep health education, the sleep restriction therapy was given in the treatment group. The control group only received sleep health education and was followed up weekly by telephone or Internet. Pittsburgh sleep quality index (PSQI), Epworth Sleepiness Scale (ESS), Parkinson's disease rating scale Part 3 (UPDRS-Ⅲ), Hamilton Anxiety Rating Scale (HAMA), Hamilton Depression Rating Scale (HAMD) and 36-item Shot-form Health Status Survey (SF-36) were used to evaluate the sleep status, motor symptoms, emotional state and quality of life of the patients.

  Results  The total effective rate of two groups showed a significant difference(P < 0.05). After intervention, there were statistically significant differences in PSQI, ESS, HAMA and HAMD scores between the two groups (P < 0.05). After intervention, the patients in the observation group scored (73.86±6.57) in SF-36, which was higher than (45.21±7.31) of the control group (P < 0.05).

  Conclusion  Sleep restriction therapy has high operability, and is easy to learn, master and popularize. It can improve sleep quality, emotional state and life quality of patients with insomnia disorder comorbid to Parkinson's disease.