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Table 1 Patient demographics and risk factors in osteoarthritis

From: CDH2 gene rs11564299 polymorphism is a risk factor for knee osteoarthritis in a Chinese population: a case–control study

Variable Cases (n = 348) Controls (n = 423) P
Age (years) 62.23 ± 8.13 62.50 ± 7.64 0.640
Body mass index, kg/m2 24.37 ± 1.55 24.27 ± 1.47 0.327
Sex    0.457
 Male 69 (19.83%) 75 (17.73%)  
 Female 279 (80.17%) 348 (82.27%)  
Smoking    0.885
 Yes 102 (29.31%) 126 (29.79%)  
 No 246 (70.69%) 297 (70.21%)  
Alcohol    0.710
 Yes 132 (37.93%) 166 (39.24%)  
 No 216 (62.07%) 257 (60.76%)  
ESR, mm/h 10.64 ± 11.43   
CRP, mg/L 7.69 ± 17.47   
Kellgren–Lawrence grading    
 II 180 (51.72%)   
 III 102 (29.31%)   
 IV 66 (18.97%)   
  1. CRP C-reactive protein, ESR erythrocyte sedimentation rate