Table 1 Characteristics of the included studies
Study | Study design | Total hips/stage of hips | Sex (F/M) | Mean age (year) | Mean follow-up (month) |
|---|---|---|---|---|---|
Wei et al. 2011 [19] | Prospective, noncontrolled study | 223 IIA, 10 IIB, 61 IIC, 63 IIIA, 89 | 61/101 | 33.5 (19–54) | 24 |
Zeng et al. 2015 [20] | Retrospective, noncontrolled study | 18 IIB, 5 IIC, 13 | 3/15 | 40.7 (22–49) | 53.3 |
Wu et al. 2018 [21] | Retrospective, noncontrolled study | 29 IIA, 9 IIB, 13 IIC, 4 IIIA, 3 | 7 (hips)/22 (hips) | 38.9 (24–58) | 168 |
Cao et al. 2018 [22] | Prospective randomized trial | II, 12 III, 17 | 10/17 | 37.6 (20–62) | 41.1 |
II, 13 III, 13 | 8/18 | 36.9 (18–60) | 43.9 | ||
Feng et al. 2019 [23] | Retrospective cohort study | IIA, 12 IIB, 28 IIC, 19 IIIA, 4 IIIB, 4 IIIC, 2 | 39/30 | 31.5 (21–45) | 84 |
IIA, 3 IIB, 5 IIC, 5 IIIA, 18 IIIB, 18 IIIC, 20 |