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Table 2 Leg shortening: baseline patient characteristics after matching

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

Baseline characteristics   Controls (N = 825) Cases (N = 275)
Sex M 50.2% 50.2%
  F 49.8% 49.8%
Age at procedure (years) Mean (SD) 67 (9) 67 (9)
Weight (kg) Mean (SD) 75 (14) 75 (13)
Height (cm) Mean (SD) 167 (9) 167 (9)
Charnley class A 59.7% 62.2%
  BB 17.5% 16.8%
  B 20.9% 18.9%
  C 1.9% 2.1%
Previous Surgery Yes 4.0% 4.7%
Clinic Size small 10.1% 10.5%
  medium 32.6% 26.6%
  large 57.3% 62.9%
Fixation of components all cemented 18.3% 16.3%
  all uncemented 17.8% 16.7%
  hybrid 50.2% 50.6%
  reverse hybrid 13.7% 16.4%
Duration of procedure <90 min 46.9% 48.0%
  90 min > x <135 min 40.9% 42.9%
  >135 min 12.2% 9.1%
Decade of procedure 1970's 5.2% 1.1%
  1980's 44.5% 48.0%
  1990's 49.0% 49.8%
  after year 2000 1.3% 1.1%
  1. Abbreviation: SD = standard deviation.