Table 2

Characteristics of the material

Characteristic

Total

Symptomatic DIP OA

Pa


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)


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.

aP value for the comparison between DIP OA status groups (Student's t-test or chi-square test).

Kämäräinen et al. Arthritis Research & Therapy 2008 10:R21   doi:10.1186/ar2374

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