Aasprang Anny, Andersen John Roger, Våge Villy, Kolotkin Ronette L, Natvig Gerd Karin
Faculty of Health Studies, Sogn og Fjordane University Collage , Førde , Norway ; Department of Global Public Health and Primary Care, University of Bergen , Bergen , Norway.
Faculty of Health Studies, Sogn og Fjordane University Collage , Førde , Norway ; Department of Surgery, Førde Central Hospital , Førde , Norway.
PeerJ. 2015 Sep 29;3:e1275. doi: 10.7717/peerj.1275. eCollection 2015.
Background. The aims of this study were to translate the Obesity-Related Problem scale (OP scale) into the Norwegian language and test its reliability, validity and responsiveness in a Norwegian sample. Method. The questionnaire (OP scale) was translated from the original language (Swedish) into Norwegian. Patients completed the questionnaire prior to and one year after sleeve gastrectomy. Internal consistency was evaluated using Cronbach's α. Construct validity was tested by correlating the OP-scale with the SF-36 and the Cantril Ladder using the Pearson correlation coefficient. An exploratory and confirmatory factor analysis was used to test the unidimensionality of the OP scale. Responsiveness was tested by assessing changes in the OP scale from baseline to one year post-surgery using the paired sample t-test. Floor and ceiling effect were calculated as percentages. Results. A total of 181 patients (123 women) accepted for bariatric surgery was included in the study. The mean age was 43.1 ± 12.5 years, and mean body mass index (BMI) before surgery was 45 ± 6.9. The mean value of the OP scale at baseline was 63.30 ± 24.43 (severe impairment) and 21.01 ± 20.98 at one year follow-up (mild impairment). Internal consistency was high at baseline (Cronbach's α 0.91). The floor effect was small at baseline and high at one year. The ceiling effect was small at baseline and at one year. Exploratory and conformatory factor analysis showed one factor with a high percent of explained variance. Correlations between OP scale at baseline, SF-36, Cantril Ladder and BMI were statistically significant and in the predicted direction to support validity of the Norwegian OP scale. After one year correlations between the change in OP scale and the change in SF-36 scores, Cantril Ladder and BMI were also statistically significant, except for the change in the Role Physical-scale. The OP scale showed greater responsiveness than either the SF-36 or Cantril Ladder. Conclusion. These results confirm that the Norwegian version of the OP scale is a valid and reliable instrument for measuring psychosocial functioning in patients with clinically severe obesity.
背景。本研究的目的是将肥胖相关问题量表（OP量表）翻译成挪威语，并在挪威样本中测试其信度、效度和反应度。方法。问卷（OP量表）从原语言（瑞典语）翻译成挪威语。患者在袖状胃切除术之前和术后一年完成问卷。使用克朗巴哈α系数评估内部一致性。通过使用皮尔逊相关系数将OP量表与SF-36和坎特里尔阶梯量表进行相关性分析来测试结构效度。使用探索性和验证性因素分析来测试OP量表的单维度性。通过使用配对样本t检验评估从基线到术后一年OP量表的变化来测试反应度。计算地板效应和天花板效应的百分比。结果。共有181名接受减肥手术的患者（123名女性）纳入研究。平均年龄为43.1±12.5岁，术前平均体重指数（BMI）为45±6.9。OP量表在基线时的平均值为63.30±24.43（严重损害），在一年随访时为21.01±20.98（轻度损害）。基线时内部一致性较高（克朗巴哈α系数为0.91）。地板效应在基线时较小，在一年时较高。天花板效应在基线和一年时均较小。探索性和验证性因素分析显示一个因素具有高比例的解释方差。基线时OP量表、SF-36、坎特里尔阶梯量表和BMI之间的相关性具有统计学意义，且方向符合预期，以支持挪威OP量表的效度。一年后，除了身体功能角色量表的变化外，OP量表变化与SF-36评分变化、坎特里尔阶梯量表和BMI之间的相关性也具有统计学意义。OP量表显示出比SF-36或坎特里尔阶梯量表更高的反应度。结论。这些结果证实，挪威版的OP量表是测量临床严重肥胖患者心理社会功能的有效且可靠的工具。
