Table 1.
Demographic and perioperative patient data
| Variable | Femoral block† | Infiltration† | p Value |
|---|---|---|---|
| (n = 30) | (n = 29) | ||
| Age (years) | 66.6 (36–78, 9.5) | 67.3 (54–78, 6.8) | 0.719 |
| Weight (kg) | 83.7 (52.2–121.6) | 89.0 (64.7–121.0) | 0.253 |
| Height (cm) | 164.8 (147.3–177.8, 8.9) | 165.6 (151.1–185.0, 9.3) | 0.757 |
| Sex: female/male | 23/7 | 16/13 | 0.081 |
| Side: right/left | 16/14 | 18/11 | 0.497 |
| Preoperative flexion (degrees) | 115.0 (90.0–135.0, 14.0) | 115.3 (80.0–150.0, 18.5) | 0.959 |
| Diagnosis | 0.383 | ||
| Osteoarthritis | 28 | 28 | |
| Avascular necrosis | 2 | 0 | |
| Rhumatoid arthritis | 0 | 1 | |
| Surgery duration (minutes) | 102.8 (73.0–148.0, 17.4) | 108.9 (70.0–160.0, 19.1) | 0.205 |
| Total operating room time (minutes)* | 170.8 (125.0–215.0, 22.3) | 161.4 (106.0–224.0, 27.1) | 0.152 |
| Postoperative days when patient met discharge criteria | 5.0 (3–15, 2.3) | 4.9 (3–8, 1.3) | 0.550 |
| Length of hospital stay (days) | 6.8 (5–16, 2.6) | 6.6 (5–15, 2.1) | 0.919 |
†Mean (minimum–maximum, SD); * minus time to perform placebo femoral block in the infiltration group (mean, 9.9 minutes).