Journal
CANCER EPIDEMIOLOGY BIOMARKERS & PREVENTION
Volume 14, Issue 12, Pages 2855-2861Publisher
AMER ASSOC CANCER RESEARCH
DOI: 10.1158/1055-9965.EPI-05-0217
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Funding
- NCI NIH HHS [R01 CA 76330, R01 CA 084140, R01 CA 097263] Funding Source: Medline
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Background: Psychosocial constructs are widely used to predict colorectal cancer screening and are targeted as intermediate outcomes in behavioral intervention studies. Reliable and valid instruments for measuring general colorectal cancer screening psychosocial constructs are needed; yet, few studies have conducted psychometric analyses. This study replicated a five-factor structure for 16 theory-based, general colorectal cancer screening items measuring salience and coherence, cancer worries, perceived susceptibility, response efficacy, and social influence. In addition, we examined factorial invariance across race and sex. Methods: African American and Caucasian patients (n = 1,413) attending an urban, primary care clinic were included in this study. These individuals completed a baseline survey as part of a colorectal cancer screening intervention trial. Single and multigroup confirmatory factor analyses using maximum-likelihood estimation were done. Results: The five-factor general colorectal cancer screening model provided excellent fit and was invariant across race-sex subgroups. Conclusions: The findings of invariance across sex and race subgroups support the use of these scales to measure group differences.
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