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Colorectal cancer screening among first-degree relatives of colorectal cancer patients
Annals of Surgical Oncology, 06/03/09

Mack LA et al. - In a trial to estimate the proportion of first-degree relatives (FDR) of colorectal cancer (CRC) pts being screened for CRC and to identify predictors of screened behavior, it was found that 70% of FDR of CRC pts had undergone screening; age was the most important predictor. Understanding underlying constructs influencing screening behavior may improve uptake of CRC screening in this population.

Methods

A questionnaire was mailed to 640 stage I–III CRC pts from a population-based registry to identify FDR.
A survey was sent to 747 FDR, aged 40 or older, to assess CRC screening, knowledge, demographics, access, benefits, and barriers of CRC screening.
Factor analysis was used to detect underlying constructs.
Predictors of screening were explored by multivariate analysis (MVA).

Results

There was a 54% and 51% response for pts and FDR, respectively.
Among FDR, 86% were born in Canada, 94% spoke English, 93.5% had a high school education, 73% were married, and 55% were employed.
Age distribution was: 40–44 yrs (19.7%), 45–49 (19.1%), 50–54 (16%), 55–59 (15.2%), 60–64 (9.8%), and >65 (18%).
70% had undergone CRC screening with 60% adherent to current guidelines.
Of those screened, 33.7% had fecal occult blood testing, 19.4% had barium enema, 10.7% had sigmoidoscopy, and 58.7% had colonoscopy.
5 constructs influencing CRC screening include: salience and coherence, perceived susceptibility, response efficacy, social influence, and cancer worries.
MVA determined age >50 yrs as the most important predictor of screening.

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