Table 1

Demographic and clinical characteristics of all subjects in the study

Variables

Cases (n = 750)

Control (n = 794)

P


Age, years, mean ± SD

65.2 ± 7.6

65.1 ± 5.4

ns

Female, n (%)

401 (53.47%)

406 (51.13%)

ns

BMI, kg/m2, mean ± SD

27.7 ± 2.4

22.5 ± 3.1

0.001

Smoker, n (%)

283 (37.73%)

291 (36.65%)

ns

Family history of OA, n (%)

60 (8.00%)

67 (8.43%)

ns

History of labor work, n (%)

140 (18.66%)

158 (19.89%)

ns

Hypertension

198 (26.4%)

206 (25.9%)

ns

Diabetes mellitus

152 (20.3%)

166 (20.9%)

ns

KL grade

= < 3

351

-

> 3

399

-


BMI, body mass index; OA, osteoarthritis; KL, Kellgren-Lawrence; ns, not significant.

Jiang et al. Arthritis Research & Therapy 2013 15:R3   doi:10.1186/ar4129

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