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Table 3 Comparison of pre- and postoperative hip ROM

From: Impingement-free hip range of motion after osteochondroplasty and relative neck lengthening in adults with healed Perthes disease

ROM Preoperative Postoperative Paired t test
Mean ± SD Mean ± SD P value (significance)
Flexion 50.7 ± 9.4 116.9 ± 11 < 0.0001 (ES)
IR with flexion 7.75 ± 3.7 42.6 ± 7
Abduction 23.4 ± 5.8 44 ± 2.8
  1. IR Internal rotation, SD Standard deviation, ES Extremely significant, ROM Range of motion