Selected studies comparing outcomes of minimally invasive and standard-incision total hip replacement
| Study | Design | Final follow-up | Sample size | Primary outcome | Findings at follow-up (mini-incision v. standard incision) |
|---|---|---|---|---|---|
| Dorr et al.80 | RCT | 6 mo | 60 | Total blood loss, mL, mean | 352.3 ± 145.5 v. 408.3 ± 158.3, p = 0.12 |
| Length of stay, h, mean | 63.2 ± 13.3 v. 73.6 ± 23.5, p = 0.04 | ||||
| Ogonda et al.77 | RCT | 6 wk | 219 | 10-m walk time, s, mean | 54.4 ± 29.8 v. 54.5 ± 32.7, p = 0.97 |
| Stair climbing, s, mean | 19.31 ± 8.78 v. 19.58 ± 9.38, p = 0.83 | ||||
| Hematocrit level on discharge, mean | 0.275 ± 0.04 v. 0.276 ± 0.04, p = 0.75 | ||||
| 36-h VAS pain score, mean | 16.8 ± 20.3 v. 19.8 ± 21.2, p = 0.29 | ||||
| Chimento et al.79 | Retrospective, matched cohort | 1 | 60 | Total blood loss, mL, mean | 378 ± 151 v. 504 ± 205, p < 0.009 |
| 6-wk limp | 21.4% v. 46.8%, p = 0.04 | ||||
| 1-yr limp | None | ||||
| Hospital length of stay, d, mean (range) | 5.8 (4–13) v. 5.5 (3–15), p = 0.6 |
Note: RCT= randomized controlled trial, VAS = visual analogue scale.