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Table 1 Descriptive characteristics by primary analysis outcome

From: Development of a clinical prediction algorithm for knee osteoarthritis structural progression in a cohort study: value of adding measurement of subchondral bone density

Characteristic

Overall (n = 533)

Non-progressors (n = 482)

Progressors (n = 51)

Female (n, %)

252 (47%)

226 (47%)

26 (51%)

Age years (mean, SD)

64.6 (9.2)

64.2 (9.2)

68.3 (7.5)

Body mass index kg/m2 (mean, SD)

29.6 (4.8)

29.5 (4.7)

30.4 (4.9)

Knee pain (mean, SD)

3.5 (2.8)

3.4 (2.8)

4.1 (2.7)

Recent injury (n, %)

11 (2%)

9 (2%)

2 (4%)

Hand OA (n, %)

191 (36%)

160 (33%)

31 (61%)

M:L BMD (mean, SD)

1.1 (0.2)

1.1 (0.1)

1.2 (0.2)

Radiographic knee OA (n, %)

369 (69%)

324 (67%)

45 (88%)

  1. OA osteoarthritis, M:L BMD ratio medial-to-lateral tibial plateau bone mineral density ratio