| Usual Care Only | Duration of Exposure to Medical Home (months) | ||
|---|---|---|---|
| ≤4 (n = 351) | >4 and <8 (n = 316) | ≥8 (n = 499) | |
| Primary outcome | |||
| Any CRCS* | |||
| Unadjusted percent (95% CI) | 36.8 (31.9–41.9) | 34.8 (29.7–40.2) | 44.9 (40.6–49.3) |
| Adjusted RR† (95% CI) | 1.00 (Referent) | 0.99 (0.81–1.18) | 1.29 (1.15–1.42) |
| Adjusted difference‡ (95% CI) | Referent | −0.2 (−6.9 to 6.5) | 10.1 (5.7–14.6) |
| Secondary outcomes | |||
| Any fecal test§ | |||
| Unadjusted percentage (95% CI) | 21.1 (17.1–25.7) | 20.6 (16.5–25.4) | 32.7 (28.7–36.9) |
| Adjusted RR† (95% CI) | 1.00 (Referent) | 0.99 (0.64–1.35) | 1.58 (1.22–1.94) |
| Adjusted difference‡ (95% CI) | Referent | −0.1 (−7.6 to 7.3) | 12.1 (5.9–18.2) |
| Any endoscopy | |||
| Unadjusted percentage (95% CI) | 21.4 (17.4–26.0) | 20.6 (16.5–25.4) | 18.2 (15.1–21.9) |
| Adjusted RR† (95% CI) | 1.00 (Referent) | 1.03 (0.77–1.29) | 0.95 (0.73–1.18) |
| Adjusted difference‡ (95% CI) | Referent | 0.6 (−4.5 to 5.8) | −0.9 (−5.4 to 3.6) |
↵* Any colorectal cancer screening (CRCS) test included completion of fecal occult blood tests, flexible sigmoidoscopy, or colonoscopy during year 1 of the Systems of Support to Increase Colorectal Cancer Screening Trial (SOS). All patients were overdue for CRCS.
↵† Relative risk (RR) of screening in the exposure group relative to the group with ≤4 months of exposure to a patient-centered medical home (PCMH), adjusted for age, sex, race, education, and prior CRCS.
↵‡ Adjusted difference is the percentage screened in the exposure group minus the percentage screened in group with ≤4 months of exposure to a PCMH, adjusted for age, sex, race, education, and prior CRCS.
↵§ Hemoccult SENSA.
CI, confidence interval.