Reliability and validity of the Pittsburgh Sleep Quality Index in breast cancer patients
Reliability and validity of the Pittsburgh Sleep Quality Index in breast cancer patients
复制标题
匹兹堡睡眠质量指数在乳腺癌患者中的信度和效度
DOI：
10.1007/s00520-017-3713-9
复制
发表时间：
2017-10-01
影响因子：
3.1
通讯作者：
Lunet, Nuno
中科院分区：
文献类型：
--
作者：
Fontes, Filipa;Goncalves, Marta;Lunet, Nuno
我们的目的是评估因素结构，内部一致性，重测信度，结构效度的欧洲葡萄牙版本的匹兹堡睡眠质量指数（PSQI）在乳腺癌patients.This研究是基于一个队列的乳腺癌患者，其中PSQI被用来衡量癌症诊断后三年的睡眠质量（N = 474）。62名参与者的样本进行了额外的PSQI测试，连续五天佩戴腕关节活动记录仪，并在一个月后重新评估PSQI。考虑到主成分分析（PCA）建议的成分，进行验证性因子分析，以确定模型拟合。为了评估内部一致性和重测信度，分别计算Cronbach’s alpha和组内相关系数（ICC）。为了评估结构效度，计算PSQI评分与体动计测量值和其他理论相关结构之间的斯皮尔曼相关系数。后者表现出更好的拟合数据，虽然这两个因素有很强的相关性（r = 0.76）和内部一致性是不令人满意的因素之一。关于单因素模型，内部一致性（Cronbach's alpha = 0.70）和重测信度（ICC = 0.76）是足够的。睡眠持续时间、习惯性睡眠效率和睡眠障碍维度与相应的体动仪测量指标显著相关;单因素模型得出的PSQI总体评分与主观睡眠主诉相关性更强（r >= 0.60）。
We aimed to assess the factor structure, internal consistency, test-retest reliability, and construct validity of the European Portuguese version of the Pittsburgh Sleep Quality Index (PSQI) in breast cancer patients.This study was based on a cohort of breast cancer patients, among whom the PSQI was used to measure sleep quality three years after cancer diagnosis (N = 474). A sample of 62 participants underwent additional PSQI testing, wore a wrist actigraph for five consecutive days, and was reevaluated with the PSQI after one month. A confirmatory factor analysis, considering the components suggested by the principal component analysis (PCA), was performed to determine model fit. To evaluate internal consistency and test-retest reliability, Cronbach's alpha and intraclass correlation coefficient (ICC) were calculated, respectively. To assess construct validity, Spearman's correlation coefficients were computed between PSQI scores and actigraphy measures and other theoretical related constructs.PCA suggested one or two components. The latter showed better fit to the data, though the two factors were strongly correlated (r = 0.76) and internal consistency was not satisfactory for one of the factors. Regarding the one-factor model, internal consistency (Cronbach's alpha = 0.70) and test-retest reliability (ICC = 0.76) were adequate. Sleep duration, habitual sleep efficiency, and sleep disturbance dimensions were significantly correlated with the corresponding actigraphy measures; the PSQI global score derived from the one-factor model was more strongly correlated with subjective sleep complaints (r >= 0.60).The unidimensional construct of the European Portuguese version of the PSQI showed adequate reliability and validity among breast cancer patients.