Crude incidence rates (95% CI) of osteoarthritis (OA) in the fiscal year 2008/2009 per 1000 person-years at different age cutpoints using a 17-year run-in to delete the prevalent cases.
| Age, yrs | Def1 | Def2 | ||||
|---|---|---|---|---|---|---|
| Men | Women | Total | Men | Women | Total | |
| All* | 12.5 (12.0–13.0) | 16.3 (15.8–16.8) | 14.6 (14.0–14.8) | 7.1 (6.8–7.4) | 9.2 (8.9 –9.6 ) | 8.2 (7.9–8.4) |
| ≥ 20 | 14.9 (14.3–15.5) | 19.3 (18.7–20.0) | 17.1 (16.7–17.5) | 8.4 (7.9–8.8) | 10.8 (10.3–11.2) | 9.6 (9.3–9.9) |
| ≥ 30 | 18.0 (17.3–18.7) | 23.3 (22.6–24.1) | 20.7 (20.1–21.2) | 10.0 (9.5–10.5) | 12.9 (12.4–13.5) | 11.5 (11.1–11.8) |
| ≥ 40 | 21.5 (20.7–22.4) | 28.5 (27.5–29.5) | 25.0 (24.3–25.6) | 11.9 (11.3–12.5) | 15.7 (15.1–16.4) | 13.9 (13.4–14.3) |
| ≥ 50 | 26.8 (25.6–28.0) | 36.6 (35.2–38.0) | 31.6 (30.6–32.5) | 15.3 (14.4–16.1) | 20.1 (19.2–21.1) | 17.7 (17.1–18.3) |
Def1: One visit to a health professional or 1 hospital diagnosis; Def2: Two visits to a health professional in 2 years or 1 hospital diagnosis.
↵*OA cases below age 20 years were deleted, but the person-years for all individuals at risk were used in the denominator.