The correlative study between sleep quality and psychological health of secondary insomnia of type 2 diabetes mellitus

Abstract

Objective To investigate the relation between sleep quality and mental health of secondary insomnia of type 2 diabetes mellitus and to provide a new treatment for this disease.Methods Ninety patients suffering from secondary insomnia of type 2 diabetes mellitus were evaluated and analyzed with Pittsburgh Sleep Quality Index(PSQI)and Symptom Checklist 90(SCL-90).Results The mean total PSQI score was 14.13 with a standard deviation of 3.38 in the sampled patients.According to the total score PSQI≥11 as a standard of poor sleep quality,poor sleep quality was present by 83.33%of the subjects with no significant difference between males and females(75 cases:male 22,female 53).According to the single item score PSQI≥2 as,a positive case,poor sleep quality was present by 95.56%(86 cases),insufficiency of sleep time was present by 42.22%(38 cases),low sleeping efficiency was present by 53.33%(48 cases).All these patients had sleep disturbance.There were 21 patients(21.33%)taking drugs for insomnia,81patients(90%)with long sleep latency and 78 patients (86.67%)had daytime dysfunction.The correlation coemcient between total PSQI score and total SCL-90 score was r=0.400(P＜0.01).All the factors were significantly related to total PSQI score,except phobic factor.The correlation coemcient between somatization and total PSQI score was r=0.400(P＜0.01).The correlation coemcient between sleep disturbance and somatization was r=0.458(P＜0.01).Through multiple stepwise regression analysis we found that somatization was the major factor affecting sleep disturbance.Conclusion Sleep quality of patients suffering from secondary insomnia of type 2 diabetes mellitus had a closely relationship with psychological factors especially somatization of SCL-90.Psychological treatment for improving somatization symptoms should be considered. Key words: Secondary insomnia of type 2 diabetes mellitus; Sleep quality; Psychological health