Psychometric evaluation of the sleep hygiene index: a sample of patients with chronic pain

被引:37
作者
Cho, Sungkun [1 ]
Kim, Gye-Seok [2 ]
Lee, Jang-Han [3 ]
机构
[1] Chungnam Natl Univ, Dept Psychol, Taejon 305764, South Korea
[2] Sangji Univ, Dept Business Adm, Wonju, Gangwon Do, South Korea
[3] Chung Ang Univ, Dept Psychol, Seoul 156756, South Korea
基金
新加坡国家研究基金会;
关键词
Sleep Hygiene Index; Sleep quality; Chronic pain; Psychometric properties; DISTURBANCE; SCALE;
D O I
10.1186/1477-7525-11-213
中图分类号
R19 [保健组织与事业(卫生事业管理)];
学科分类号
摘要
Background: Sleep Hygiene Index (SHI) was designed to assess sleep hygiene. Although the SHI has shown adequate psychometric properties in a nonclinical sample, it has not been validated in a sample with chronic pain. Also, its factor structure, measurement error, and incremental validity over and above other factors affecting sleep quality have not been investigated in a nonclinical sample. Thus, this present study aimed to extend prior psychometric investigation of the SHI. Specifically, we evaluated the factor structure, measurement error, and incremental validity as well as the reliabilities and concurrent validity of the SHI in a sample with chronic pain. Methods: A total of 161 patients seeking treatment in a tertiary pain center located in Seoul, Korea participated. To explore the factor structure of the SHI, we performed an exploratory factor analysis using principal component with varimax. Cronbach's alphas and intraclass correlation coefficients were computed to investigate internal consistency and 2-week test-retest stability of the SHI, respectively. Measurement error was estimated using standard error of measurement and minimum detectable change (MDC) of the SHI. For concurrent validity, Pearson correlations were calculated to examine the relations between the SHI and outcome measures including background variables. Also for incremental validity, a hierarchical multiple regression was performed in relation to sleep quality. Results: Results indicated that two-factor solution is most appropriate; sleep disturbing behavior and environment (B/E) and irregular sleep-wake schedule. Results also showed that the internal consistencies and test-retest stability estimates of the SHI were deemed acceptable. At the 95% confidence level, the MDCs were 5.75 for 'sleep disturbing B/E,' 3.65 for 'irregular sleep-wake schedule,' and 7.49 points for total. The SHI was significantly correlated with age, depression, pain-related anxiety, and sleep quality. Also, sleep quality was significantly predicted by the irregular sleep-wake schedule subscale of the SHI, over and above background variables, pain intensity, depression, pain-related anxiety. Conclusions: The SHI has the reliability, measurement error, and concurrent and incremental validity support for assessing sleep hygiene in a sample with chronic pain.
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页数:7
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