Table 1 The general condition of the patients
Group | Age | Gender (male/female) | Operation length (min) | Disease (RA/OA) | Preoperative hemoglobin (g/L) |
|---|---|---|---|---|---|
Routine drainage (n = 18) | 63.72 ± 6.10 | 8/10 | 87.50 ± 13.09 | 2/16 | 129.44 ± 7.22 |
Blood transfusion (n = 25) | 62.56 ± 6.83 | 9/16 | 82.40 ± 12.64 | 3/22 | 130.36 ± 6.01 |
Delayed drainage (n = 18) | 65.25 ± 7.22 | 4/8 | 86.50 ± 18.27 | 2/10 | 131.92 ± 5.66 |
Statistics | F = 0.666 | χ2 = 0.469 | F = 0.490 | χ2 = 0.222 | F = 0.544 |
P value | 0.518 | 0.791 | 0.615 | 0.895 | 0.584 |