Pain is one of the most common and unpleasant symptoms of patients with cancer. The Short Form Brief Pain Inventory (SF-BPI), has been psychometrically validated in several languages and widely used globally. Availability of a validated pain tool in Sinhala is a current requirement enabling the use among the majority of Sinhala-speaking cancer patients in Sri Lanka. The purpose of the study was to evaluate the psychometric properties of Sinhala translated version of SF BPI. The translation was done by forward–backward translation method. Content and face validity were evaluated by a panel of experts and patients with cancer pain respectively. The study included 151 participants with cancer pain, registered at the Pain Clinic, Apeksha Hospital, Sri Lanka. The reliability, discriminant and convergent validity were assessed. The confirmatory factor analysis (CFA) was conducted and evaluated the two factor (severity, interference) and three factor models (severity, affective/ activity interference). In the three factor model-1, item ‘sleep’ was included within the affective interference along with mood, relationship with others and enjoyment of life. In the three factor model-2, item ‘sleep’ was included within the activity interference along with general activities, walking and normal works. Ethical approval was obtained from the Ethics Review Committee, Faculty of Medical Sciences, University of Sri Jayewardenepura, Sri Lanka. A total of 151 participants (79 males, 72 females) with a mean age of 54.6 (+/− 13.2) years were included. The composite reliability (0.902, 0.879), average variance extracted (AVE) (0.647, 0.568) and Cronbach’s alpha (0.819, 0.869) calculated for each severity and interference subscales were acceptable. The discriminant validity assessed with the heterotrait-monotrait criterion was 0.18. According to the Fornell–Larcker criterion, the square root of AVE of severity and interference factors (0.804, 0.753) greater than the correlation between the factors (0.140) demonstrated the discriminant validity. The CFA supported the three-factor model-2 (CFI—0.959, SRMR—0.0513, RMSEA—0.0699) and the values for two-factor and three-factor model-1 were marginally acceptable. The Sinhala version of SF BPI is a reliable and valid instrument for the assessment of cancer pain among Sinhala speaking patients in Sri Lanka.

中文翻译：

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在斯里兰卡患有Sinhala癌痛的患者中评估简短形式简短疼痛清单Sinhala版本（SF BPI-Sin）的心理测量特性

疼痛是癌症患者最常见和不愉快的症状之一。简短形式的简短疼痛清单（SF-BPI）已通过多种语言的心理计量学验证，并在全球范围内广泛使用。当前需要在僧伽罗语中提供经过验证的止痛工具，以便能够在斯里兰卡的大多数讲僧伽罗语的癌症患者中使用。这项研究的目的是评估SF BPI的Sinhala翻译版本的心理测量特性。翻译是通过向前-向后翻译方法完成的。内容和面部有效性分别由专家小组和癌症疼痛患者评估。该研究纳入了151名患有癌症疼痛的参与者，并在斯里兰卡Apeksha医院的疼痛诊所进行了注册。评估了信度，判别力和收敛效度。进行了验证性因素分析（CFA），并评估了两个因素（严重性，干扰）和三个因素模型（严重性，情感/活动干扰）。在三因素模型1中，“睡眠”项与情绪，与他人的关系和生活享受一起被包括在情感干扰中。在三因素模型2中，“睡眠”项与一般活动，步行和正常工作一起被包括在活动干扰中。伦理批准已从斯里兰卡斯里贾德瓦德纳普拉大学的医学科学院伦理审查委员会获得。总共包括151名参与者（男性79位，女性72位），平均年龄为54.6（+/- 13.2）岁。综合可靠性（0.902，0.879），平均方差提取（AVE）（0.647，0.568）和Cronbach's alpha（0.819，0）。869）计算的每种严重程度和干扰分量表均可接受。用异质性-单性标准评估的判别效度为0.18。根据Fornell-Larcker标准，严重性和干扰因素的AVE的平方根（0.804，0.753）大于因素之间的相关性（0.140）证明了判别有效性。CFA支持三因素模型2（CFI-0.959，SRMR-0.0513，RMSEA-0.0699），而两因素模型和三因素模型-1的值勉强可以接受。SF BPI的Sinhala版本是评估斯里兰卡使用Sinhala语言的患者中癌症疼痛的可靠且有效的工具。根据Fornell-Larcker标准，严重性和干扰因素的AVE的平方根（0.804，0.753）大于因素之间的相关性（0.140）证明了判别有效性。CFA支持三因素模型2（CFI-0.959，SRMR-0.0513，RMSEA-0.0699），而两因素模型和三因素模型-1的值勉强可以接受。SF BPI的Sinhala版本是评估斯里兰卡使用Sinhala语言的患者中癌症疼痛的可靠且有效的工具。根据Fornell-Larcker标准，严重性和干扰因素的AVE的平方根（0.804，0.753）大于因素之间的相关性（0.140）证明了判别有效性。CFA支持三因素模型2（CFI-0.959，SRMR-0.0513，RMSEA-0.0699），而两因素模型和三因素模型-1的值勉强可以接受。SF BPI的Sinhala版本是评估斯里兰卡使用Sinhala语言的患者中癌症疼痛的可靠且有效的工具。0699）和两因素和三因素模型1的值勉强可以接受。SF BPI的Sinhala版本是评估斯里兰卡使用Sinhala语言的患者中癌症疼痛的可靠且有效的工具。0699）和两因素和三因素模型1的值勉强可以接受。SF BPI的Sinhala版本是评估斯里兰卡使用Sinhala语言的患者中癌症疼痛的可靠且有效的工具。