Table 8.
Unadjusted and adjusted odds ratios comparing enhanced to traditional fee-for-service produced from the CRC screening model
| Year | Unadjusted | Adjusted for Patient Characteristics | Adjusted for Patient and Physician Characteristics | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Odds Ratio | 95% CI | p-value | Odds Ratio | 95% CI | p-value | Odds Ratio | 95% CI | p-value | ||
| Income Q1 (lowest) | ||||||||||
| Enhanced vs. traditional fee-for-service | 2005 | 1.00 | (0.98–1.02) | 0.677 | 0.99 | (0.97–1.01) | 0.283 | 1.00 | (0.98–1.02) | 0.698 |
| 2006 | 1.12 | (1.10–1.14) | <.0001 | 1.11 | (1.09–1.13) | <.0001 | 1.11 | (1.10–1.13) | <.0001 | |
| 2007 | 1.24 | (1.21–1.27) | <.0001 | 1.23 | (1.20–1.26) | <.0001 | 1.24 | (1.21–1.27) | <.0001 | |
| 2008 | 1.15 | (1.12–1.19) | <.0001 | 1.16 | (1.13–1.20) | <.0001 | 1.18 | (1.14–1.22) | <.0001 | |
| 2009 | 1.26 | (1.22–1.31) | <.0001 | 1.30 | (1.25–1.35) | <.0001 | 1.29 | (1.24–1.34) | <.0001 | |
| 2010 | 1.05 | (1.00–1.10) | 0.048 | 1.07 | (1.02–1.12) | 0.009 | 1.10 | (1.04–1.15) | 0.000 | |
| 2011 | 1.01 | (0.96–1.08) | 0.655 | 1.01 | (0.95–1.08) | 0.747 | 1.05 | (0.99–1.12) | 0.115 | |
| 2012 | 1.12 | (1.05–1.20) | 0.001 | 1.20 | (1.12–1.29) | <.0001 | 1.20 | (1.12–1.29) | <.0001 | |
| Income Q5 (highest) | ||||||||||
| Enhanced vs. traditional fee-for-service | 2005 | 0.99 | (0.98–1.01) | 0.190 | 1.00 | (0.99–1.02) | 0.895 | 1.00 | (0.98–1.01) | 0.853 |
| 2006 | 1.05 | (1.04–1.07) | <.0001 | 1.07 | (1.05–1.08) | <.0001 | 1.08 | (1.06–1.09) | <.0001 | |
| 2007 | 1.24 | (1.21–1.26) | <.0001 | 1.25 | (1.22–1.28) | <.0001 | 1.26 | (1.23–1.29) | <.0001 | |
| 2008 | 1.22 | (1.18–1.26) | <.0001 | 1.25 | (1.21–1.29) | <.0001 | 1.28 | (1.24–1.32) | <.0001 | |
| 2009 | 1.26 | (1.21–1.30) | <.0001 | 1.30 | (1.25–1.35) | <.0001 | 1.28 | (1.24–1.34) | <.0001 | |
| 2010 | 1.19 | (1.13–1.25) | <.0001 | 1.22 | (1.15–1.28) | <.0001 | 1.24 | (1.17–1.31) | <.0001 | |
| 2011 | 1.21 | (1.13–1.30) | <.0001 | 1.23 | (1.15–1.32) | <.0001 | 1.27 | (1.18–1.36) | <.0001 | |
| 2012 | 1.17 | (1.09–1.27) | <.0001 | 1.25 | (1.16–1.36) | <.0001 | 1.26 | (1.16–1.36) | <.0001 | |
| Ratios of Odds Ratios | ||||||||||
| Difference in enhanced vs. traditional fee-for-service between Q1 vs. Q5 | 2005 | 1.01 | (0.98–1.03) | 0.619 | 0.99 | (0.97–1.01) | 0.344 | 1.00 | (0.97–1.02) | 0.847 |
| 2006 | 1.06 | (1.04–1.09) | <.0001 | 1.04 | (1.02–1.06) | 0.000 | 1.04 | (1.01–1.06) | 0.001 | |
| 2007 | 1.00 | (0.97–1.03) | 0.984 | 0.99 | (0.95–1.02) | 0.389 | 0.98 | (0.95–1.02) | 0.329 | |
| 2008 | 0.94 | (0.90–0.99) | 0.011 | 0.93 | (0.89–0.97) | 0.002 | 0.92 | (0.88–0.97) | 0.001 | |
| 2009 | 1.01 | (0.95–1.06) | 0.860 | 1.00 | (0.95–1.06) | 0.892 | 1.00 | (0.95–1.06) | 0.958 | |
| 2010 | 0.88 | (0.82–0.95) | 0.001 | 0.88 | (0.82–0.94) | 0.001 | 0.89 | (0.82–0.95) | 0.001 | |
| 2011 | 0.84 | (0.77–0.92) | 0.000 | 0.82 | (0.75–0.90) | <.0001 | 0.83 | (0.75–0.91) | <.0001 | |
| 2012 | 0.95 | (0.86–1.06) | 0.374 | 0.96 | (0.87–1.07) | 0.471 | 0.96 | (0.86–1.06) | 0.405 | |
Results for Q2-Q4 not shown. Ratios of odds ratios are also presented, with Q5 and traditional fee-for-service serving as referent groups