Skip to main content

Table 2 Characteristics of the material

From: Common interleukin-6promoter variants associate with the more severe forms of distal interphalangeal osteoarthritis

Characteristic Total Symptomatic DIP OA P a
   No Yes  
Number (percentage) 535 (100) 487 (91.0) 48 (9.0)  
Occupation     0.068
   Dentists, n (percentage) 290 (54.2) 270 (55.4) 20 (41.7)  
   Teachers, n (percentage) 245 (45.8) 217 (44.6) 28 (58.3)  
Age, years (mean ± SD) 53.9 ± 5.3 53.6 ± 5.2 57.7 ± 4.2 0.0001
BMI (mean ± SD) 24.5 ± 3.6 24.4 ± 3.6 25.0 ± 3.3 0.24
Smoking history     0.12
   Never, n (percentage) 396 (74.0) 356 (73.1) 40 (83.3)  
   Some time, n (percentage) 139 (26.0) 131 (26.9) 8 (16.7)  
  1. BMI, body mass index; DIP OA, distal interphalangeal osteoarthritis. Symptomatic DIP OA was defined by the presence of both radiographic findings of grade 2 or more and symptoms in at least two DIP joints.
  2. aP value for the comparison between DIP OA status groups (Student's t-test or chi-square test).