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Table 1 Characteristics of the twins

From: Dietary garlic and hip osteoarthritis: evidence of a protective effect and putative mechanism of action

  n Mean SD
Age (y) 1096 58.9 5.8
BMI (kg/m2) 1096 25.6 4.0
Hip Kellgren-Lawrence score 654 0.63 1.5
Knee Kellgren-Lawrence score 912 1.00 1.7
Hand Kellgren-Lawrence score 1082 5.63 7.6
   n %
Hip Kellgren-Lawrence score 0,1 562 85.9
  2+ 92 14.1
Knee Kellgren-Lawrence score 0,1 671 72.2
  2+ 259 27.8
Hand Kellgren-Lawrence score 0,1 456 42.0
  2+ 630 58.0
Zygosity Monozygous 454 41.4
  Dizygous 642 58.6
Physical activity Inactive 365 33.3
  Moderately active 532 48.5
  Active 199 18.2
Number of food frequency 1 351 32.0
questionnaires used 2 485 44.3
  3 236 21.5
  4 24 2.2
  1. BMI represents body mass index, n sample size, SD standard deviation