Table 2 Results of subgroup analyses
Variable | No. of studies | No. of patients (MLP/LP) | Effect estimates | 95%CI | P | Heterogeneity | |
|---|---|---|---|---|---|---|---|
I2 (%) | P | ||||||
Loss of Baumann angle | 10 | 348/340 | MD = 0.08 | − 0.15, 0.30 | 0.507 | 0 | 0.688 |
Gartland type III only | 6 | 191/185 | MD = 0.02 | − 0.36, 0.40 | 0.905 | 13.3 | 0.330 |
Various Gartland types | 4 | 157/155 | MD = 0.09 | − 0.21, 0.39 | 0.563 | 0 | 0.866 |
With mini-open technique | 3 | 121/128 | MD = -0.41 | − 0.99, 0.17 | 0.168 | 0 | 0.583 |
Without mini-open technique | 7 | 227/212 | MD = 0.16 | − 0.08, 0.40 | 0.197 | 0 | 0.889 |
Loss of reduction | 10 | 405/401 | RR = 0.70 | 0.52–0.94 | 0.018 | 0 | 0.697 |
Gartland type III only | 6 | 191/185 | RR = 0.53 | 0.29–0.98 | 0.041 | 0 | 0.853 |
Various Gartland types | 4 | 214/216 | RR = 0.77 | 0.48–1.25 | 0.228 | 12.8 | 0.329 |
With mini-open technique | 4 | 151/158 | RR = 0.48 | 0.16–1.44 | 0.191 | 42.5 | 0.157 |
Without mini-open technique | 6 | 254/243 | RR = 0.70 | 0.50–0.98 | 0.035 | 0 | 0.944 |
3rd pin allowed | 4 | 123/113 | RR = 0.63 | 0.31–1.26 | 0.189 | 0 | 0.842 |
2 pins only | 6 | 282/288 | RR = 0.69 | 0.45–1.07 | 0.095 | 13.4 | 0.329 |
Flynn criteria, excellent | 15 | 491/506 | RR = 1.06 | 0.99–1.14 | 0.102 | 0 | 0.995 |
Gartland type III only | 9 | 212/220 | RR = 1.06 | 0.95–1.18 | 0.274 | 0 | 0.988 |
Various Gartland types | 6 | 279/286 | RR = 1.07 | 0.96–1.18 | 0.223 | 0 | 0.810 |
With mini-open technique | 6 | 184/195 | RR = 1.06 | 0.95–1.19 | 0.323 | 0 | 0.947 |
Without mini-open technique | 9 | 307/311 | RR = 1.07 | 0.97–1.18 | 0.191 | 0 | 0.945 |
Iatrogenic ulnar nerve injury | 18 | 542/544 | RR = 2.21 | 1.11–4.41 | 0.024 | 0 | 0.999 |
Gartland type III only | 10 | 269/267 | RR = 2.36 | 0.89–6.29 | 0.085 | 0 | 0.983 |
Various Gartland types | 8 | 273/277 | RR = 2.07 | 0.70–5.48 | 0.141 | 0 | 0.963 |
With mini-open technique | 7 | 230/239 | RR = 1.73 | 0.47–6.31 | 0.407 | 0 | 0.856 |
Without mini-open technique | 11 | 312/305 | RR = 2.44 | 1.08–5.51 | 0.032 | 0 | 0.999 |
Pin tract infection | 12 | 362/363 | RR = 0.92 | 0.50–1.70 | 0.798 | 0 | 0.988 |
Gartland type III only | 6 | 144/149 | RR = 0.95 | 0.36–2.48 | 0.914 | 0 | 0.862 |
Various Gartland types | 6 | 218/214 | RR = 0.91 | 0.41–2.00 | 0.809 | 0 | 0.940 |
With mini-open technique | 4 | 162/168 | RR = 1.03 | 0.37–2.87 | 0.950 | 0 | 0.946 |
Without mini-open technique | 8 | 200/195 | RR = 0.87 | 0.40–1.86 | 0.715 | 0 | 0.910 |