Factorial Validity and Invariance of a Survey Measuring Psychosocial Correlates of Colorectal Cancer Screening in Ontario, Canada-A Replication Study
Factorial Validity and Invariance of a Survey Measuring Psychosocial Correlates of Colorectal Cancer Screening in Ontario, Canada-A Replication Study
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DOI：
10.1158/1055-9965.epi-08-0241
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发表时间：
2008-11-01
影响因子：
3.8
通讯作者：
Rabeneck, Linda
中科院分区：
文献类型：
--
作者：
Ritvo, Paul;Myers, Ronald;Rabeneck, Linda
心理社会结构已被用于预测结直肠癌筛查，并经常作为行为干预研究的中间结果。很少有研究进行分析，充分测试结构效度。对美国人群进行的16项基于理论的结直肠癌筛查项目的心理测量分析是一个例外，这些项目旨在测量五个因素（显着性一致性，癌症担忧，感知易感性，反应效能和社会影响）。目前的调查复制以前的工作，通过检查因素的有效性和不变性在加拿大安大略省居民的随机样本。一项调查工具被管理到1,013安大略男性（49%）和女性（51%）的居民随机选择的加拿大调查样本。单组验证性因素分析（CFA）评估数据分别适合男性和女性的五因素模型，然后多组CFA评估因素结构是否对男性和女性不变。五因素模型为男性和女性提供了良好的拟合。然而，对性别间因子不变性的测试发现了混合的结果。χ 2差异检验具有显著性（P = 0.025）;然而，Delta RMSEA = 0.0001。除两个社会影响项目外，性别因素负荷相似，项目频率分布表明女性对这些项目的极端反应风格。总体而言，单组和多组CFA结果支持在美国人群中首次发现的五因素模型的析因有效性和部分不变性。这些项目可用于评估和比较美国和加拿大样本的社会心理相关性。需要更多的研究来证明其他民族文化和民族亚群的不变性。（癌症流行病学生物标志物Prev 2008; 17（11）：3279-83）
Psychosocial constructs have been used to predict colorectal cancer screening and are frequently targeted as intermediate outcomes in behavioral intervention studies. Few studies have conducted analyses to adequately test construct validity. The psychometric analyses undertaken with U.S. populations of 16 theory-based, colorectal cancer screening items designed to measure five factors (salience-coherence, cancer worries, perceived susceptibility, response efficacy, and social influence) are an exception. The current investigation replicates previous work by examining factor validity and invariance in a random sample of Ontario, Canada residents. A survey instrument was administered to 1,013 Ontario male (49%) and female (51%) residents randomly selected by the Canada Survey Sample. Single-group confirmatory factor analyses (CFA) assessed data fit to the proposed five-factor model for males and females separately, and then a multigroup CFA evaluated if the factor structure was invariant for men and women. The five-factor model provided good fit for both males and females. Tests for factorial invariance between sexes, however, found mixed results. chi(2) difference test was significant (P = 0.025); however, Delta RMSEA = 0.0001. Factor loadings were similar by sex except for two social influence items, with item frequency distributions suggesting an extreme response style, in females, on these items. Overall, the single-group and multigroup CFA results support factorial validity and partial invariance of the five-factor model first identified in the U.S. populations. The items can be used to evaluate and compare psychosocial correlates across U.S. and Canadian samples. Additional research is needed to show invariance for other ethnocultural and national subgroups. (Cancer Epidemiol Biomarkers Prev 2008; 17(11):3279-83)