Table 1.
Data gathered before and after the operation on patients who underwent total knee arthroplasty with or without the use of a drain.
| Without drain | With drain | p value | |
|---|---|---|---|
| Number of patients | 15 | 27 | - |
| Age (years) | 69.93 ± 7.11 | 69.00 ± 9.31 | 0.738 |
| Length of hospital stay (days) | 2.31 ± 0.67 | 2.14 ± 0.35 | 1 |
| Height (m) | 1.68 ± 0.06 | 1.61 ± 0.08 | 0.131 |
| Weight (kg) | 74.2 ± 11.76 | 74.6 ± 14.04 | 0.711 |
| Duration (minutes) | 152.78 ± 37.43 | 137.62 ± 19.47 | 0.49 |
| Preoperative hemoglobin (g/dl) | 14.18 ± 2.04 | 14.12 ± 1.54 | 0.914 |
| Preoperative hematocrit (g/dl) | 41.07 ± 4.88 | 42.06 ± 3.83 | 0.421 |
| Postoperative hemoglobin | 10.47 ± 1.74 | 10.12 ± 1.14 | 0.429 |
| Postoperative hematocrit | 30.30 ± 4.26 | 30.60 ± 3.33 | 0.757 |
| Preoperative circumference (cm) | 40.27 ± 3.55 | 40.35 ± 4.66 | 0.962 |
| Postoperative circumference (cm) | 43.05 ± 3.99 | 43.27 ± 4.67 | 0.9 |
| Postoperative circumference on fifthseventh postoperative day (cm) | 43.5 ± 4.94 | 42.09 ± 4.58 | 0.931 |
| Preoperative ROM | 109.26 ± 19.99 | 98.33 ± 24.54 | 0.126 |
| ROM on first postoperative day | 65.67± 18.21 | 69.81 ± 25.36 | 0.583 |
| ROM on seventh postoperative day | 73.85 ± 20.63 | 85.96 ± 18.97 | 0.076 |
| ROM between 14th and 28th days after the operation | 78.64 ± 25.99 | 95.20 ± 14.61 | 0.025* |
| ROM six months after the operation | 109.00 ± 15.17 | 107.08 ± 15.73 | 0.848 |
Continuous variables are expressed as the mean ± standard deviation. ROM: range of motion measured by means of goniometry
*
p < 0.05