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Table 2 Outcomes of meta-analysis and subgroup analysis

From: Comparison of transverse and modified subtrochanteric femoral shortening osteotomy in total hip arthroplasty for developmental dysplasia of hip: a meta-analysis

Outcome of interest No. of studies No. of hips No. of events Pooled estimate 95% CI Study heterogeneity
χ2 I2 P value
Nonunion 39 791 27 3.79% (2.60%, 5.20%) 39.25 3.2% 0.414
Modified subgroup 15 241 5 3.03% (1.29%, 5.51%) 8.29 0.0% 0.874
Transverse subgroup 24 550 22 4.14% (2.67%, 5.20%) 30.34 24.2% 0.140
Nerve palsy 33 712 14 2.63% (1.60%, 3.87%) 21.9 0.0% 0.910
Dislocation 27 641 38 5.88% (4.22%, 7.80%) 42.35 36.2% 0.030
Modified subgroup 9 163 9 5.47% (2.57%, 9.36%) 12.99 38.4% 0.112
Transverse subgroup 18 478 29 6.03% (4.14%, 8.29%) 29.28 38.5% 0.045
Revision 22 482 45 8.90% (6.56%, 11.50%) 45.57 53.9% 0.001
Modified subgroup 8 148 10 6.66% (3.31%, 11.12%) 14.04 50.1% 0.050
Transverse subgroup 14 334 35 9.96% (7.06%, 13.35%) 29.99 56.7% 0.005
Limb-length discrepancy 7 132* 10* 6.31% (2.90%, 11.00%) 18.37 67.3% 0.005
Modified subgroup 4 72 8 9.02% (3.64%, 16.40%) 13.86 78.4% 0.003
Transverse subgroup 3 60 2 3.72% (0.50%, 9.72%) 2.83 29.3% 0.243
HHS improvement 17 337 / 26.79% (26.35%, 27.32%) 654.87 97.6% <0.001
Modified subgroup 6 107 / 27.41% (26.52%, 28.31%) 569.55 99.1% <0.001
Transverse subgroup 11 230 / 26.61% (25.99%, 27.14%) 82.56 87.9% <0.001
Deep infection 19 393 1 1.34% (0.46%, 2.67%) 2.24 0.0% 1.000
  1. *Number of patients; CI: confidential interval.