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This study examined the associations of susceptibility, conceptualized as both a cognition (risk) and as affect (worry) and their possible interaction, with cancer screening behaviors. Data for this study were obtained from the 2003 Health Information National Trends Survey (HINTS). Hierarchical regression models assessed the ability of risk, worry and their interaction (after controlling for other important variables) to predict cancer-screening behaviors. Results found that risk and worry (but not their interaction) were associated with regular mammography screening and having had a sigmoidoscopy or colonoscopy but with neither FOBT nor PSA screening. The findings suggest that risk and worry are both important in predicting some types of screening behavior and that these variables operate independently.