Mota Dálete D C F, Pimenta Cibele A M, Piper Barbara F
Sao Paulo Cancer Institute (Brazil), Av. Dr. Arnaldo, 251, 5 degrees andar, São Paulo, São Paulo 01246-000, Brazil.
Support Care Cancer. 2009 Jun;17(6):645-52. doi: 10.1007/s00520-008-0518-x. Epub 2008 Nov 6.
The objective of this study was to validate the Piper Fatigue Scale-Revised (PFS-R) for use in Brazilian culture.
Translation of the PFS-R into Portuguese and validity and reliability tests were performed. Convenience samples in Brazil we as follows: 584 cancer patients (mean age 57 +/- 13 years; 51.3% female); 184 caregivers (mean age 50 +/- 12.7 years; 65.8% female); and 189 undergraduate nursing students (mean age 21.6 +/- 2.8 years; 96.2% female); Instruments used were as follows: Brazilian PFS, Beck Depression Inventory (BDI), and Karnofsky Performance Scale (KPS).
The 22 items of the Brazilian PFS loaded well (factor loading > 0.35) on three dimensions identified by factor analysis (behavioral, affective, and sensorial-psychological). These dimensions explained 65% of the variance. Internal consistency reliability was very good (Cronbach's alpha ranged from 0.841 to 0.943 for the total scale and its dimensions). Cancer patients and their caregivers completed the Brazilian PFS twice for test-retest reliability and results showed good stability (Pearson's r > or = 0.60, p < 0.001). Correlations among the Brazilian PFS and other scales were significant, in hypothesized directions, and mostly moderate contributing to divergent (Brazilian PFS x KPS) and convergent validity (Brazilian PFS x BDI). Mild, moderate, and severe fatigue in patients were reported by 73 (12.5%), 167 (28.6%), and 83 (14.2%), respectively. Surprisingly, students had the highest mean total fatigue scores; no significant differences were observed between patients and caregivers showing poor discriminant validity.
While the Brazilian PFS is a reliable and valid instrument to measure fatigue in Brazilian cancer patients, further work is needed to evaluate the discriminant validity of the scale in Brazil.
本研究的目的是验证修订后的派珀疲劳量表（PFS-R）在巴西文化中的适用性。
对PFS-R进行了葡萄牙语翻译，并进行了效度和信度测试。巴西的便利样本如下：584名癌症患者（平均年龄57±13岁；51.3%为女性）；184名护理人员（平均年龄50±12.7岁；65.8%为女性）；以及189名本科护理专业学生（平均年龄21.6±2.8岁；96.2%为女性）。使用的工具如下：巴西PFS、贝克抑郁量表（BDI）和卡诺夫斯基功能状态量表（KPS）。
巴西PFS的22个项目在因子分析确定的三个维度（行为、情感和感觉-心理）上负荷良好（因子负荷>0.35）。这些维度解释了65%的方差。内部一致性信度非常好（总量表及其维度的克朗巴赫α系数范围为0.841至0.943）。癌症患者及其护理人员两次完成巴西PFS以进行重测信度，结果显示稳定性良好（皮尔逊r≥0.60，p<0.001）。巴西PFS与其他量表之间的相关性在假设方向上具有显著性，且大多为中度，有助于区分效度（巴西PFS×KPS）和聚合效度（巴西PFS×BDI）。患者中轻度、中度和重度疲劳的报告分别为73例（12.5%）、167例（28.6%）和83例（14.2%）。令人惊讶的是，学生的平均总疲劳得分最高；患者和护理人员之间未观察到显著差异，显示出较差的区分效度。
虽然巴西PFS是测量巴西癌症患者疲劳的可靠且有效的工具，但仍需要进一步开展工作以评估该量表在巴西的区分效度。
