Table 1.
The demographic characteristics of the patients who underwent routine primary TKA
| Baseline characteristic | Drain use (n = 4540) | No drain (n = 1785) | All (n = 6325) |
|---|---|---|---|
| Demographic characteristics | |||
| Age (X ± S) | 66.56 ± 8.79 | 66.68 ± 8.64 | 66.60 ± 8.75 |
| Female, N (%) | 3613 (79.58%) | 1358 (76.08%) | 4971 (78.59%) |
| BMI (kg/m2) | 25.84 ± 5.48 | 25.04 ± 3.56 | 25.62 ± 5.02 |
| Diagnosis, N (%) | |||
| OA | 4241 (93.41%) | 1683 (94.29%) | 5924 (93.66%) |
| Inflammatory arthritis | 299 (6.59%) | 102 (5.71%) | 401 (63.40%) |
| Comorbidities, N (%) | |||
| Hypertension | 1351 (29.76%) | 356 (19.94%) | 1707 (26.99%) |
| Type 2 diabetes | 360 (7.93%) | 73 (4.09%) | 433 (6.85%) |
| CHD | 182 (4.01%) | 35 (1.96%) | 217 (3.43%) |
| COPD | 24 (0.53%) | 10 (0.56%) | 34 (0.54%) |
BMI body mass index, OA osteoarthritis, CHD coronary heart disease, COPD chronic obstructive pulmonary disease