Reliability and validity of Insomnia Severity Index in clinical insomnia patients
10.3760/cma.j.issn.1672-7088.2018.28.005
- VernacularTitle:失眠严重程度指数量表在临床失眠患者评估中的信效度研究
- Author:
Chunjie BAI
1
;
Daihong JI
;
Lixia CHEN
;
Liang LI
;
Chunxia WANG
Author Information
1. 116000,大连大学护理学院
- Keywords:
Insomnia;
Reliability;
Validity
- From:
Chinese Journal of Practical Nursing
2018;34(28):2182-2186
- CountryChina
- Language:Chinese
-
Abstract:
Objective To test the reliability and validity of the Chinese version of Insomnia Severity Index(ISI-C) in patients with insomnia. Methods One hundred and twenty patients with insomnia were selected from Zhongshan Hospital Affiliated to Dalian University. The subjects had completed the ISI-C scale and Pittsburgh Sleep quality Index(PSQI) scale, Epworth Sleepiness Scale(ESS) at the same time. The reliability and validity of the scale were tested by Cronbach α coefficient, item correlation analysis, exploratory factor analysis and ROC curve test. Results The Cronbach α coefficient of the ISI-C was 0.804,the test-retest reliability was 0.887 (P<0.01). The items of ISI-C scale were correlated with the corresponding items of PSQI (r=0.831, P<0.01), ESS(r =0.218, P<0.05). Two common factors were extracted by factor analysis including the severity of insomnia and the influence of insomnia, and the cumulative contribution rate was 63.117% (P<0.01).When the cutting point was 10.5 points, the sensitivity and specificity were 84.0% and 92.3%, respectively (P<0.01). Conclusions ISI-C scale is a reliable and valid instrument. It can be used to measure the insomnia of patients in hospitals.
