Accuracy of Self-Reported Cancer-Screening Histories: A Meta-analysis

^{1 1}Division of Epidemiology and Biostatistics, ²Survey Research Laboratory, and ³Institute for Health Research and Policy, University of Illinois at Chicago, and ⁴Department of Medicine, The University of Chicago, Chicago, Illinois

^* To whom correspondence should be addressed. E-mail: garthr{at}uic.edu.

	Abstract

Background: Survey data used to study trends in cancer screening may overestimate screening utilization while potentially underestimating existing disparities in use.

Methods: We did a literature review and meta-analysis of validation studies examining the accuracy of self-reported cancer-screening histories. We calculated summary random-effects estimates for sensitivity and specificity, separately for mammography, clinical breast exam (CBE), Pap smear, prostate-specific antigen testing (PSA), digital rectal exam, fecal occult blood testing, and colorectal endoscopy.

Results: Sensitivity was highest for mammogram, CBE, and Pap smear (0.95, 0.94, and 0.93, respectively) and lowest for PSA and digital rectal exam histories (0.71 and 0.75). Specificity was highest for endoscopy, fecal occult blood testing, and PSA (0.90, 0.78, and 0.73, respectively) and lowest for CBE, Pap smear, and mammogram histories (0.26, 0.48, and 0.61, respectively). Sensitivity and specificity summary estimates tended to be lower in predominantly Black and Hispanic samples compared with predominantly White samples. When estimates of self-report accuracy from this meta-analysis were applied to cancer-screening prevalence estimates from the National Health Interview Survey, results suggested that prevalence estimates are artificially increased and disparities in prevalence are artificially decreased by inaccurate self-reports.

Conclusions: National survey data are overestimating cancer-screening utilization for several common procedures and may be masking disparities in screening due to racial/ethnic differences in reporting accuracy. (Cancer Epidemiol Biomarkers Prev 2008;17(4):748–57)

Key Words: cancer, meta-analysis, screening

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