Table 3.
Surgical factors of patients in the study.
| Factor | Number | Mean LOS | Median LOS [25th Percentile, 75th Percentile] | p-Value |
|---|---|---|---|---|
| Surgeon - TKA | ||||
| 1 | 17 (3.3%) | 3.1 ± 0.9 | 3 [3, 3] | <0.0001* |
| 2 | 357 (69.2%) | 4.0 ± 1.4 | 4 [3, 4] | |
| 3 | 32 (6.2%) | 3.7 ± 1.2 | 3 [3, 4] | |
| 4 | 8 (1.6%) | 4.0 ± 0.8 | 4 [4, 5] | |
| 5 | 102 (19.8%) | 3.7 ± 1.0 | 4 [3, 4] | |
| Day of operation | ||||
| Monday | 7 (1.4%) | 2.9 ± 1.1 | 3 [2, 4] | 0.0002* |
| Tuesday | 43 (8.3%) | 3.8 ± 1.5 | 3 [3, 4] | |
| Wednesday | 69 (13.4%) | 4.0 ± 1.3 | 4 [3, 4] | |
| Thursday | 97 (18.8%) | 3.8 ± 1.0 | 4 [3, 4] | |
| Friday | 230 (44.6%) | 4.1 ± 1.4 | 4 [3, 4] | |
| Saturday | 70 (13.6%) | 3.6 ± 0.8 | 4 [3, 4] | |
| Anticoagulation | ||||
| None | 4 (0.8%) | 4.3 ± 0.5 | 4 [4, 5] | <0.0001* |
| Aspirin | 45 (8.7%) | 3.4 ± 0.9 | 3 [3, 4] | |
| Aspirin + Coumadin | 73 (14.1%) | 4.0 ± 1.4 | 4 [3, 4] | |
| Aspirin + Coumadin + Lovenox/Heparin | 5 (1.0%) | 5.4 ± 2.1 | 5 [4, 5] | |
| Aspirin + Lovenox/Heparin | 1 (0.2%) | 3 | 3 [3, 3] | |
| Coumadin | 376 (72.9%) | 3.9 ± 1.2 | 4 [3, 4] | |
| Coumadin + Lovenox/Heparin | 11 (2.1%) | 5.4 ± 2.4 | 4 [4, 6] | |
| Lovenox | 1 (0.2%) | 3 | 3 [3, 3] | |
*
Obtained from Kruskal-wallis test.