Table 2.
Blood loss data of all patients undergoing TKA.
| Outcome | CTKA (n = 187) | RATKA (n = 299) | P value |
|---|---|---|---|
| Mean, std dev | Mean, std dev | ||
| Hb (gm/dl) POD1 | 10.7 ± 1.3 | 10.9 ± 1.3 | .24a |
| Δ Hb (gm/dl, preoperative−POD1) | 2.5 ± 1.1 | 2.5 ± 1.1 | .99a |
| Largest Δ Hb (gm/dl)c | 3.1 ± 1.1 | 3.1 ± 1.1 | .92a |
| Blood transfusion, n (%) | .79b | ||
| Yes | 2 (1.1%) | 4 (1.3%) | |
| No | 185 (98.9%) | 295 (98.7%) |
Hb, hemoglobin; std dev, standard deviation.
a
t-test.
b
Pearson’s chi square Test.
c
Preoperative Hb value−lowest Hb values within 2 d postoperatively.