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Table 4 Pre- and (final) postoperative age- and sex-dependent changes in mHHS and NRS

From: Results of advanced core decompression in patients with osteonecrosis of the femoral head depending on age and sex—a prospective cohort study

Subgroup “Age”mHHS (mean ± SD)NRS (mean ± SD)
preoperativepostoperativepreoperativepostoperative
Subgroup 1
(< 30 years)
69.67 ± 13.3984.86 ± 8.01
FU1 88.25 ± 1.89
FU2 89.25 ± 1.26
FU3 87.40 ± 1.67
FU4 83.50 ± 8.57
3.56 ± 2.131.00 ± 1.16
FU1 0.75 ± 0.96
FU2 0.50 ± 0.58
FU3 0.80 ± 0.84
FU4 1.00 ± 1.10
Subgroup 2
(≥30/<40 years)
72.31 ± 12.6587.07 ± 5.21
FU1 83.92 ± 8.14
FU2 87.67 ± 3.72
FU3 86.50 ± 1.00
FU4 86.00 ± 5.07
3.75 ± 2.300.93 ± 1.33
FU1 1.00 ± 1.16
FU2 0.83 ± 0.98
FU3 0.75 ± 0.96
FU4 0.86 ± 1.22
Subgroup 3
(≥ 40/< 50 years)
72.19 ± 14.6186.76 ± 8.93
FU1 85.36 ± 8.13
FU2 88.14 ± 4.45
FU3 89.00 ± 4.87
FU4 87.08 ± 8.14
3.37 ± 2.361.12 ± 2.12
FU1 0.91 ± 1.14
FU2 0.43 ± 0.54
FU3 0.50 ± 0.76
FU4 1.57 ± 2.24
Subgroup 4 (≥ 50 years)67.09 ± 13.8485.19 ± 9.40
FU1 88.00 ± 4.99
FU2 84.00 ± 8.76
FU3 87.56 ± 4.50
FU4 87.10 ± 5.13
4.21 ± 1.890.81 ± 1.11
FU1 0.43 ± 0.65
FU2 0.90 ± 0.99
FU3 0.56 ± 0.73
FU4 0.70 ± 1.06
Subgroup “Sex”
Male71.39 ± 13.9286.70 ± 7.82
FU1 86.45 ± 6.39
FU2 86.37 ± 6.74
FU3 87.71 ± 4.08
FU4 86.22 ± 6.35
3.59 ± 2.220.75 ± 1.13
FU1 0.83 ± 1.10
FU2 0.74 ± 0.81
FU3 0.57 ± 0.75
FU4 1.07 ± 1.51
Female65.10 ± 12.6084.50 ± 8.55
FU1 85.23 ± 8.01
FU2 87.38 ± 5.07
FU3 88.20 ± 2.68
FU4 86.38 ± 8.47
4.45 ± 1.731.57 ± 2.24
FU1 0.62 ± 0.65
FU2 0.63 ± 0.92
FU3 0.80 ± 0.84
FU4 1.11 ± 1.63
Total69.93 ± 13.8186.13 ± 7.993.79 ± 2.140.96 ± 1.52
  1. SD standard deviation, FU1 follow-up 6 weeks, FU2 follow-up 6 months, FU3 follow-up 12 months, FU4 follow-up 24 months