Table 2.
Study outcomes
| Study outcomes | Coumadin continued (N = 38) | Coumadin discontinued (N = 39) | Unadjusted risk ratio* (95% confidence interval) | Age-adjusted risk ratio† (95% confidence interval) |
|---|---|---|---|---|
| Additional procedure type, number (%) | ||||
| I & D | 1 (3) | 1 (3) | ||
| PRS flap | — | 1 (3) | ||
| Additional procedure required, number (%) | ||||
| Yes | 1 (3) | 2 (5) | 0.51 | 0.43 |
| No | 37 (97) | 37 (95) | (0.01–9.86) | (0.01–9.18) |
| Complication type, number (%) | ||||
| Dehiscence | — | 1 (3) | ||
| Hematoma | 1 (3) | 1 (3) | ||
| Infected open wound | — | 1 (3) | ||
| None | 37 (97) | 36 (92) | ||
| Complication occurred, number (%) | ||||
| Yes | 1 (3) | 3 (8) | 0.34 | 0.29 |
| No | 37 (97) | 36 (92) | (0.01–4.26) | (0.01–4.26) |
| Transfusion (units), number (%) | ||||
| 0 | 30 (79) | 29 (74) | ||
| 1 | 1 (3) | 2 (5) | ||
| 2 | 7 (18) | 6 (15) | ||
| 4 | — | 2 (5) | ||
| Transfusion required, number (%) | ||||
| Yes | 8 (21) | 10 (26) | 0.82 | 0.61 |
| No | 30 (79) | 29 (74) | (0.28–2.31) | (0.20–1.86) |
| Transfusion (units) | ||||
| Mean ± SD | 0.4 ± 0.8 | 0.6 ± 1.1 | 0.70 | 0.50 |
| Median (IQR) | 0 (0–0) | 0 (0–1) | (0.34–1.41) | (0.23–1.06) |
* Risk ratio is warfarin continued postoperative proportion, or mean, over warfarin preoperative only proportion, or mean, from an exact Poisson regression model; †risk ratio is from an exact Poisson regression model that includes age (continuous variable) as a covariate; I & D = irrigation and debridement; PRS = plastic and reconstructive surgery; SD = standard deviation; IQR = interquartile range.