Hemoglobin levels of patients undergoing primary arthroplasty between Jan. 1, 2004, and Dec. 31, 2005
| Hemoglobin, g/L | Drug; mean (SD) | p value | |
|---|---|---|---|
| Warfarin* | Dalteparin† | ||
| Overall | |||
| Preoperative level | 137.96 (13.85) | 139.49 (13.30) | 0.023 |
| Women | 135.37 (12.88) | 134.91 (11.45) | 0.56 |
| Men | 141.93 (14.35) | 146.39 (12.93) | < 0.001 |
| Postoperative level‡ | 94.67 (14.13) | 93.30 (12.99) | 0.041 |
| Women‡ | 93.20 (12.41) | 90.80 (11.96) | 0.002 |
| Men‡ | 96.91 (16.18) | 97.06 (13.57) | 0.90 |
| Total hip arthroplasty | |||
| Preoperative level | 138.33 (15.18) | 138.88 (13.84) | 0.62 |
| Women | 134.88 (14.43) | 133.58 (11.61) | 0.34 |
| Men | 142.61 (15.04) | 145.70 (13.51) | 0.06 |
| Postoperative level‡ | 94.79 (14.50) | 92.72 (13.74) | 0.05 |
| Women‡ | 91.30 (11.88) | 88.39 (12.31) | 0.019 |
| Men‡ | 99.12 (16.23) | 98.30 (13.51) | 0.63 |
| Total knee arthroplasty | |||
| Preoperative level | 137.69 (12.79) | 139.95 (12.87) | 0.007 |
| Women | 135.68 (11.80) | 135.81 (11.26) | 0.88 |
| Men | 141.30 (13.71) | 147.01 (12.39) | < 0.001 |
| Postoperative level‡ | 94.58 (13.86) | 93.74 (12.38) | 0.33 |
| Women‡ | 94.41 (12.60) | 92.44 (11.45) | 0.046 |
| Men‡ | 94.88 (15.91) | 95.96 (13.57) | 0.50 |
SD = standard deviation.
↵* Administered to patients undergoing primary arthroplasty between Jan. 1, 2004 and Dec. 31, 2004.
↵† Administered to patients undergoing primary arthroplasty between Jan. 1, 2005, and Dec. 31, 2005.
↵‡ The lowest postoperative hemoglobin level taken from either postoperative day 1 or 3. The lowest hemoglobin level was chosen.