Table 3.
Surgical factors of patients in the study
| Factor | Number | Mean LOS | p value |
|---|---|---|---|
| Surgeon (TKA) | |||
| 1 | 59 (2.8%) | 2.9 ± 1.1 | <0.0001a |
| 2 | 36 (1.7%) | 2.8 ± 0.7 | |
| 3 | 512 (24.3%) | 3.4 ± 1.4 | |
| 4 | 7 (0.3%) | 3.1 ± 0.4 | |
| 5 | 51 (2.4%) | 3.2 ± 0.8 | |
| 6 | 185 (8.8%) | 3.4 ± 1.1 | |
| 7 | 19 (0.9%) | 3.6 ± 1.1 | |
| 8 | 421 (20.0%) | 3.4 ± 1.4 | |
| 9 | 301 (14.3%) | 3.3 ± 1.2 | |
| 10 | 136 (6.5%) | 3.4 ± 1.2 | |
| 11 | 71 (3.4%) | 3.5 ± 1.4 | |
| 12 | 239 (11.4%) | 3.5 ± 1.2 | |
| 13 | 67 (3.2%) | 3.7 ± 1.2 | |
| Day of operation | |||
| Monday | 461 (21.9%) | 3.2 ± 0.9 | <0.0001a |
| Tuesday | 93 (4.4%) | 3.2 ± 1.0 | |
| Wednesday | 543 (25.8%) | 3.6 ± 1.5 | |
| Thursday | 271 (12.9%) | 3.5 ± 1.4 | |
| Friday | 554 (26.3%) | 3.4 ± 1.2 | |
| Saturday | 182 (8.7%) | 3.1 ± 1.3 | |
| Anticoagulation | |||
| None | 29 (1.4%) | 3.4 ± 1.0 | <0.0001a |
| Aspirin | 1,573 (74.8%) | 3.3 ± 1.1 | |
| Aspirin + coumadin | 200 (9.5%) | 3.6 ± 1.4 | |
| Aspirin + coumadin + lovenox/heparin | 21 (1.0%) | 4.7 ± 2.3 | |
| Aspirin + lovenox/heparin | 26 (1.2%) | 4.0 ± 3.2 | |
| Coumadin | 215 (10.2%) | 3.6 ± 1.1 | |
| Coumadin + lovenox/heparin | 34 (1.6%) | 4.4 ± 2.1 | |
| lovenox | 6 (0.3%) | 3.8 ± 1.6 | |
*obtained from Kruskal–Wallis test