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Table 1 Leg lengthening: baseline patient characteristics after matching

From: Total hip arthroplasty: leg length inequality impairs functional outcomes and patient satisfaction

Baseline characteristics   Controls (N = 1434) Cases (N = 478)
Sex M 46.7% 46.7%
  F 53.3% 53.3%
Age at procedure (years) Mean (SD) 67 (9) 67 (9)
Weight (kg) Mean (SD) 74 (14) 75 (15)
Height (cm) Mean (SD) 165 (9) 165 (9)
Charnley class A 54.3% 47.4%
  BB 22.4% 29.6%
  B 21.4% 21.1%
  C 1.9% 1.9%
Previous Surgery Yes 3.6% 4.4%
Clinic Size small 5.0% 5.0%
  medium 52.4% 49.2%
  large 42.6% 45.8%
Fixation of Components all cemented 17.5% 16.3%
  all uncemented 18.0% 18.8%
  hybrid 50.0% 49.2%
  reverse hybrid 14.5% 15.7%
Duration of procedure <90 min 54.5% 55.4%
  90 min > x < 135 min 38.6% 37.7%
  >135 min 6.9% 6.9%
Decade of procedure 1970's 3.0% 1.5%
  1980's 50.8% 50.0%
  1990's 45.3% 47.7%
  after 2000 0.9% 0.8%
  1. Abbreviation: SD = standard deviation.