Table 1

Baseline characteristics of patients with OA and RDD controls

Baseline characteristicsPatients with OA (N=460)RDD controls (N=345)Adjusted OR* (95% CI)
Female (%)405 (88)221 (64)
Age, years, mean (range, SD)61 (35–85, 9.9)57 (40–76, 9.2)
BMI, >25 kg/m2 (%)226 (60)160 (46)1.6 (1.2 to 2.3)
Marital status (%)300 (65)206 (60)1.8 (1.3 to 2.6)
Employment (%)148 (32)100 (29)2.2 (1.6 to 3.2)
Low education (%)160 (23)115 (33)0.8 (0.6 to 1.3)
Current smoking (%)67 (22)90 (26)0.7 (0.4 to 1.0)
  • Results are shown as number (%) unless stated otherwise.

  • * Adjustment for age, gender and all other demographic characteristics in the table.

  • BMI, body mass index; OA, osteoarthritis; RDD, random digit dialling.