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Table 1 Characteristics (%/mean) of the whole study population and according to type of work

From: Leg-length discrepancy is associated with low back pain among those who must stand while working

  All Customer service workers Meat cutters
  All Female Male All Female Male All Female Male
Total number 148 61 87 34 29 5 114 32 82
Age (years) 47 49 46 48 49 40 47 48 46
Height (m) 1.73 1.65 1.78 1.68 1.66 1.78 1.74 1.64 1.78
LLD (mm) 5.4 4.5 6.0 5.4 5.2 6.6 5.4 3.8 6.0
LLD > 5 mm 48 37 55 44 45 40 49 29 56
LLD > 10 mm 16 11 18 15 10 40 16 13 17
Relative LLD a 6.4 5.7 6.8 6.7 6.5 7.7 6.3 4.9 6.8
BMI (kg/m 2 ) 27.1 27.0 27.1 27.0 27.5 24.1 27.1 26.5 27.3
Smoking b 23 23 22 18 21 0 24 26 24
Depressive feelings 3.1 2.6 3.4 2.5 2.4 3.2 3.3 2.8 3.4
Work ability 8.1 8.1 8.0 8.5 8.5 8.6 7.9 7.7 8.0
Days with LBP c 53 56 51 28 27 32 60 83 52
LBP intensity d 3.1 3.1 3.1 2.9 3.1 1.6 3.2 3.2 3.1
  1. LLD = leg length discrepancy, LBP = low back pain; aLLD as a percentage of mean leg length; bThe participants were categorized as current smokers if they smoked at least 2 days a week; cSelf-reported number of days with LBP during the past year; dPain intensity during the past week assessed using a 10-cm Visual Analogue Scale.
  2. Customer service workers sit mostly in their work, while meat cutters stand.