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Table 1 Demographics of study participants

From: The association between ANKH promoter polymorphism and chondrocalcinosis is independent of age and osteoarthritis: results of a case–control study

  CC present CC absent  
  n = 658 n = 4,283 P
Age in years, mean (SD) 70.89 (8.09) 67.58 (8.58) <0.001
Female gender, number (percentage) 325 (49.4%) 2,240 (52.3%) 0.165
Body mass index in kg/m2, mean (SD) 28.52 (4.83) 29.48 (5.47) <0.001
Knee or hip OA, number (percentage) 584 (90.0%) 3,378 (79.0%) <0.001
  1. CC, chondrocalcinosis; OA, osteoarthritis; SD, standard deviation.