Table 2:
Adjusted odds ratios for 30-day postoperative outcomes, by covariate
| Covariate | Adjusted OR (95% CI)* | ||||
|---|---|---|---|---|---|
| Composite outcome† | Death | Hospital readmission | Complication | LOS | |
| Surgeon characteristic | |||||
| Surgeon age (increments of 10 yr) | 0.95 (0.92–0.98) | 0.95 (0.91–1.00) | 0.98 (0.97–0.99) | 0.94 (0.89–0.98) | 1.01 (0.99–1.02) |
| Surgeon sex | |||||
| Female v. male | 0.96 (0.93–0.99) | 0.85 (0.73–0.99) | 1.00 (0.98–1.02) | 0.93 (0.89–0.98) | 0.98 (0.94–1.02) |
| Surgeon volume (quartiles) | |||||
| 1 (lowest) | Ref. | Ref. | Ref. | Ref. | Ref. |
| 2 | 0.92 (0.89–0.94) | 0.83 (0.68–1.01) | 0.96 (0.94–0.98) | 0.91 (0.87–0.95) | 0.91 (0.86–0.97) |
| 3 | 0.91 (0.87–0.95) | 0.67 (0.51–0.87) | 0.95 (0.91–0.99) | 0.91 (0.81–1.01) | 0.88 (0.81–0.95) |
| 4 (highest) | 0.88 (0.84–0.93) | 0.66 (0.51–0.84) | 0.93 (0.89–0.97) | 0.87 (0.79–0.97) | 0.85 (0.77–0.94) |
| Patient characteristic | |||||
| Patient sex | |||||
| Female v. male | 0.78 (0.69–0.88) | 0.60 (0.40–0.91) | 0.92 (0.87–0.98) | 0.73 (0.65–0.82) | 0.93 (0.85–1.00) |
| Patient age | 1.02 (1.01–1.02) | 1.09 (1.06–1.11) | 1.01 (1.00–1.01) | 1.02 (1.01–1.02) | 1.01 (1.01–1.02) |
| Income quintile | |||||
| 1 (lowest) | Ref. | Ref. | Ref. | Ref. | Ref. |
| 2 | 0.95 (0.94–0.96) | 0.89 (0.83–0.97) | 0.95 (0.94–0.96) | 0.97 (0.96–0.99) | 0.94 (0.92–0.96) |
| 3 | 0.92 (0.90–0.95) | 0.83 (0.73–0.95) | 0.93 (0.91–0.94) | 0.94 (0.90–0.98) | 0.90 (0.87–0.93) |
| 4 | 0.91 (0.88–0.94) | 0.78 (0.71–0.87) | 0.91 (0.90–0.93) | 0.93 (0.88–0.97) | 0.88 (0.85–0.91) |
| 5 (highest) | 0.89 (0.85–0.92) | 0.73 (0.62–0.87) | 0.90 (0.88–0.92) | 0.90 (0.85–0.95) | 0.86 (0.82–0.90) |
| Rurality | |||||
| Yes v. no | 0.98 (0.96–1.00) | 1.04 (0.93–1.15) | 1.04 (1.02–1.06) | 0.92 (0.90–0.94) | 1.02 (0.97–1.09) |
| Aggregated Diagnosis Group | |||||
| 0–5 | Ref. | Ref. | Ref. | Ref. | Ref. |
| 6–7 | 1.07 (1.05–1.09) | 0.91 (0.81–1.01) | 1.11 (1.09–1.13) | 1.04 (1.02–1.05) | 1.04 (1.01–1.08) |
| 8–10 | 1.21 (1.17–1.25) | 1.12 (0.97–1.30) | 1.29 (1.25–1.32) | 1.11 (1.07–1.14) | 1.15 (1.09–1.21) |
| 11+ | 1.59 (1.50–1.69) | 1.81 (1.44–2.28) | 1.68 (1.59–1.78) | 1.35 (1.26–1.45) | 1.45 (1.30–1.62) |
| Hospital type | |||||
| Academic v. community | 1.08 (1.04–1.11) | 1.05 (0.86–1.28) | 1.06 (1.03–1.10) | 1.12 (1.06–1.19) | 0.97 (0.86–1.08) |
Note: CI = confidence interval, LOS = length of stay, OR = odds ratio, Ref. = reference category.
*
We also adjusted estimates for effect of geographic region of residence, surgical specialty and year of surgery.
†
Comprising death, readmission or complication within 30 days.