Table 3.
Meta-analysis results of clinical outcomes
| Outcome | Groups (n) | Studies (n) | Overall effect | |||
|---|---|---|---|---|---|---|
| MIS | Conv | Effect estimate | 95% CI | p-value | ||
| Incision length | 869 | 803 | 17 | −7.56 | −8.17, −6.95 | <0.0001 |
| Intraoperative blood loss | 621 | 656 | 12 | −42.44 | −60.14, −24.73 | <0.0001 |
| Length of stay | 840 | 856 | 15 | −0.59 | −1.07, −0.12 | 0.01 |
| VAS paina | 359 | 339 | 7 | −0.55 | −0.97, −0.13 | 0.01 |
| Harris hip score | 784 | 797 | 17 | 1.49 | 0.08, 3.06 | 0.06 |
| Surgical duration | 1077 | 1066 | 22 | −4.65 | −9.45, 0.15 | 0.06 |
| Required blood transfusion | 95 | 133 | 7 | 0.75 | −0.56, 1.02 | 0.06 |
| WOMAC score | 402 | 419 | 6 | 2.55 | −0.75, 5.84 | 0.13 |
| Blood loss in drain | 200 | 195 | 6 | −53.46 | −133.55, 26.62 | 0.19 |
| Oxford hip score | 169 | 170 | 2 | −0.92 | −2.62, 0.77 | 0.29 |
| Total blood loss | 738 | 701 | 15 | −43.09 | −135.79, 49.62 | 0.36 |
MIS minimally invasive surgery, Conv conventional surgery, CI confidence interval
aStandardised mean difference