Abstract
To assess the effect of differing health insurance coverage of physician office visits on the use of colorectal cancer (CRC) tests among an employed and insured population. Cohort study of persons ages 50 to 64 years enrolled in fee-for-service (FFS) or preferred provider organization (PPO) health plans, where FFS plan enrollees bear disproportionate share of office visit coverage, for the period 1995 through 1999. Compared with FFS plans, enrollees in PPO plans were significantly more likely to obtain CRC tests [adjusted relative risk (RR(a)), 1.27; 95% confidence intervals (CI), 1.21-1.24]. The association was more pronounced among hourly individuals (RR(a), 1.43; 95% CI, 1.41-1.45) than among salaried individuals (RR(a), 1.09; 95% CI, 1.05-1.10), consistent with a greater differential in office visit coverage among the hourly group. Disproportionate cost-sharing seems to have a negative effect on the use of CRC tests most likely by discouraging nonacute care physician office visits.
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