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Table 4 The changes and paired samples t test of pre- and postoperative HHS

From: Accuracy and practicability of a patient-specific guide using acetabular superolateral rim during THA in Crowe II/III DDH patients: a retrospective study

  n HHS mean t value P value
Preoperative 17 40.65 ± 9.66 − 20.518 0.000
Postoperative (12 weeks) 87.29 ± 4.40
Preoperative 16a 39.94 ± 9.51 − 22.796 0.000
Postoperative (24 weeks) 92.38 ± 2.03
Postoperative (12 weeks) 16a 87.25 ± 4.54 − 5.149 0.000
Postoperative (24 weeks) 92.38 ± 2.03
  1. aOne patient only completed the follow-up at 12 weeks after surgery