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Table 2 Summary of clinical features of study subjects

From: Analyses of outcomes of one-stage operation for treatment of late-diagnosed developmental dislocation of the hip: 864 hips followed for 3.2 to 8.9 years

Characteristics Young Middle Older Total
Patients (hips) 183(206) 391(576) 78(82) 652(864)
 Age (y) 1.9 ± 0.23 4.6 ± 0.65 9.6 ± 1.2 5.8 ± 2.12
Sex     
 Male (%) 29(16.1) 57(14.7) 13(17) 99(15.2)
 Female (%) 154(83.9) 334(85.3) 65(83) 553(84.8)
 AI (d) 43.5 ± 5.12 41.2 ± 3.12 42.6 ± 1.5 42.2 ± 6.32
Tonnis grade (hips)     
 Grade I 34 86 16 136
 Grade II 56 157 46 259
 Grade III 77 186 10 273
 Grade IV 39 147 10 196
 Follow-up (y) 6.4 ± 2.81 6.12 ± 2.23 6.15 ± 2.45 6.20 ± 2.98