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目的评价12条目简短生命质量量表(SF-12)在西部农村青少年生命质量测量中的信度和效度。方法于2015年11月采用整群随机抽样方法对在四川省资中县抽取的2所农村中学2 871名初一和高一年级学生进行问卷调查;采用内部一致性信度评估量表的信度,采用集合效度、区分效度和结构效度评估量表的效度,并检验SF-12量表在不同人群中的区分度。结果 SF-12量表总的Cronbach’sα系数为0.80,生理健康总测量因子(PCS)和心理健康总测量因子(MCS)的Cronbach’sα系数分别为0.66和0.74,各维度删除该维度系数后Cronbach’sα系数均>0.75,量表的内部一致性较好;集合效度和区分效度试验成功率均为100%,量表中各条目与相应维度的相关性系数r均>0.80;探索性因子分析结果显示,特征根>1的2个公因子累计方差贡献率为51.56%;验证性因子分析模型适配度良好(χ~2/df=4.189、GFI=0.996、CFI=0.992、RM R=0.017、RM SEA=0.033、NFI=0.989、IFI=0.992);不同特征学生PCS和M CS得分比较,不同性别、留守情况、抑郁症状及2周内患病或感到身体不适学生PCS和MCS得分和不同年级MCS得分差异均有统计学意义(P<0.05),量表具有较好的区分度。结论 SF-12量表在西部农村青少年生命质量的测量中具有较高的信度、效度和区分度。
Objective To evaluate the reliability and validity of the 12-item short quality of life scale (SF-12) in measuring the quality of life of adolescents in western rural areas. Methods A total of 2 871 first-year and first-year freshmen from 2 rural secondary schools in Zizhong County, Sichuan Province, were surveyed in a randomized cluster sampling method in November 2015. The internal consistency reliability was used to evaluate the reliability of the scale . The validity of the questionnaire was evaluated by using the set validity, discriminative validity and structural validity. The discriminative degree of the SF-12 in different populations was tested. Results The Cronbach’s α coefficient of SF-12 scale was 0.80, Cronbach’s α coefficient of total physical health measure factor (PCS) and total mental health measure factor (MCS) were 0.66 and 0.74, respectively. Cronbach’sα coefficients were all> 0.75, and the internal consistency of scale was better; the success rate of both the set validity and the discriminant validity test was 100%, and the correlation coefficient r of all items in the scale with the corresponding dimension was> 0.80; The result of sex factor analysis showed that the cumulative variance of two common factors with characteristic root> 1 was 51.56%, and the fitness of confirmatory factor analysis model was good (χ ~ 2 / df = 4.189, GFI = 0.996, CFI = 0.992, RM The difference of PCS and M CS score among different characteristics students, gender, staying condition, depressive symptoms and illness or feeling unwell for 2 weeks in students with PCS and MCS Scores and MCS scores at different grades were significantly different (P <0.05), the scale has a good degree of differentiation. Conclusion The SF-12 scale has a high reliability, validity and discrimination in measuring the quality of life of adolescents in rural areas of western China.