Objective To assess the reliability and validity of the Pittsburgh sleep quality index (PSQI) .Methods The cross-sectional survey was conducted in the outpatient department of this hospital .544 insomnia and non-insomnia voluntary participants (18-65 years old) from July to October 2011 were assessed with PSQI and the insomnia severity index (ISI) ,which were randomly delivered to them .Results The test-retest reliability of PSQI was 0 .994 .The split-half reliability coefficient of PSQI was 0 .824 . The overall Cronbach′s alpha coefficient was 0 .845 .The confirmatory factor analysis showed that the fitting indicators for the χ2/df ,root mean square error of approximation(RMSEA) ,non-normed fit index(NNFI) ,comparative fit index(CFI) and goodness-of-fit index(GFI) were 4 .83 ,0 .09 ,0 .96 ,0 .98 and 0 .97 respectively .The correlation coefficient between the PSQI and ISI was 0 .842 . The correlations coefficients between PSQI with the questionnaire type ,interview date and interview department were -0 .046 , 0 .276 and -0 .331 .Grouping by individuals with or without insomnia ,the area under the receiver operator characteristic curve (ROC) for PSQI was 0 .944(95% CI:0 .925-0 .963) .Conclusion PSQI has good reliability and validity ,and could be used for the sleep quality comprehensive evaluation in the patients with insomnia .%目的：评估匹兹堡睡眠质量指数（PSQI）的信度及效度。方法收集2011年7～10月广东省中医院门诊候诊处544位年龄在18～65岁自愿接受调查的失眠及非失眠者。采用 PSQI量表进行横断面调查。除 PSQI外，还采用了失眠严重指数（ISI）。对PSQI和ISI两个量表的发放顺序进行了随机。结果 PSQI的重测信度为0．994。PSQI的分半信度系数为0．824，总体Cronbach′s α系数为0．845。验证性因子分析各项拟合度指标χ2/df、近似误差方根（RMSEA）、非范拟合指数（NNFI）、比较拟合指数（CFI）、拟合优度指数（GFI）分别为4．83、0．09、0．96、0．98、0．97。PSQI和ISI总分间的相关系数为0．842。PSQI与调查表类型（不同的发放顺序）、调查日期及调查科室之间的相关系数分别为-0．046、0．276、-0．331。以患者自评是否有失眠作为分组因素，根据PSQI得分绘制的ROC曲线，PSQI曲线下的面积为0．944（95％ CI：0．925～0．963）。结论 PSQI具有较好的信度、效度，可用于对失眠患者的睡眠质量的综合评价。
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