The aim of the present study was to culturally adapt, translate and validate the functional assessment of chronic illness therapy tuberculosis (FACIT-TB) scale with a view to assess health related quality of life among pulmonary tuberculosis patients in Sri Lanka. The cultural adaptation was performed by Delphi method. The translation into Sinhala (the local Sri Lankan dialect) was carried out through forward–backward translation method by five translators. A multidisciplinary team of experts assessed the Sinhala FACIT-TB scale for its content validity. The construct validity, the reliability and the acceptability of the scale were determined by conducting a validation study among 225 pulmonary tuberculosis patients. The confirmatory factor analysis technique was used to assess the construct validity. The reliability was assessed through internal consistency by Cronbach’s alpha and test re- test reliability by intraclass correlation coefficient after one week of assessment. The FACIT-TB showed adequate content validity. The confirmatory factor analysis yielded high fit indices with the original five factor model of FACIT-TB: Root Mean Square Error of Approximation (RMSEA) =0.05, Standardized Root Mean Square Residual (SRMSR) =0.07, Comparative Fit Index (CFI) =0.94 and Non –Normal Fit Index (NNFI) =0.94. Reliability showed high internal consistency with Cronbach’s alpha values exceeding the Nunnally’s criteria of 0.7 and all factors of the scale showed high test-retest reliability with intra-class correlation coefficient exceeding 0.7. Overall the FACIT-TB Sinhala version showed adequate validity to assess health related quality of life among pulmonary tuberculosis patients in Sri Lanka.

本研究的目的是在文化上适应，翻译和验证慢性病治疗结核病（FACIT-TB）量表的功能评估，以评估斯里兰卡肺结核患者的健康相关生活质量。文化适应采用德尔菲法进行。由五名翻译者通过向前-向后翻译方法将其翻译成僧伽罗语（斯里兰卡当地话）。一个多学科专家小组评估了Sinhala FACIT-TB量表的内容有效性。通过对225名肺结核患者进行验证研究，确定了量表的结构效度，信度和可接受性。验证性因子分析技术用于评估构建体的有效性。在一周的评估后，通过Cronbach's alpha通过内部一致性评估可靠性，并通过类内相关系数对重新测试的可靠性进行评估。FACIT-TB显示出足够的内容有效性。验证性因子分析使用FACIT-TB的原始五因子模型得出了高拟合指数：近似均方根误差（RMSEA）= 0.05，标准均方根残差（SRMSR）= 0.07，比较拟合指数（CFI）= 0.94非正常拟合指数（NNFI）= 0.94。可靠性显示出很高的内部一致性，克朗巴赫（Cronbach）α值超过了纳纳利（Nunnally）的0.7标准，并且所有量表因素都显示出高的重测信度，组内相关系数超过0.7。