Agreement Between Scales in the Measurement of Breast Cancer Risk Perceptions

Marilyn M. Schapira, Susan L. Davids, Timothy L. McAuliffe and Ann B. Nattinger

Risk Analysis, 2004, vol. 24, issue 3, 665-673

Abstract: The objective of this article is to compare the accuracy and numeric responses of breast cancer risk perception as measured by a frequency scale and percentage scale. A cross‐sectional survey was conducted. Perceptions of five‐year and lifetime breast cancer risk were measured using a frequency and a percentage scale. Estimation error was calculated as the absolute difference between actual breast cancer risk as determined by the Gail model and perceived risk. Agreement between scales was determined by calculating the mean and standard deviation of the difference between numeric responses. The study was conducted among women enrolled in two primary care clinics associated with an academic medical center. Two‐hundred‐fifty‐four participants were recruited from one of the two participating internal medicine clinics. Inclusion criteria included female gender and age 40–84 years. Exclusion criteria included a history of breast cancer, dementia, or a life expectancy of less than two years. The frequency scale was more accurate than the percentage scale in estimating lifetime risk (p= 0.05), but less accurate in estimating five‐year risk (p

Date: 2004
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Persistent link: https://EconPapers.repec.org/RePEc:wly:riskan:v:24:y:2004:i:3:p:665-673

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