Crude and age-standardized incidence rates (95% CI) of osteoarthritis (OA) per 1000 person-years during the period 2000/2001–2008/2009 using a 9-year run-in to delete the prevalent cases.
| Fiscal Year | Men Def1 | Men Def2 | Women Def1 | Women Def2 | ||||
|---|---|---|---|---|---|---|---|---|
| Crude | Standardized | Crude | Standardized | Crude | Standardized | Crude | Standardized | |
| 00/01 | 11.8 (11.4–12.2) | 12.7 (12.2–13.1) | 6.3 (6.0–6.6) | 6.8 (6.5–7.2) | 15.7 (15.2–16.1) | 17.0 (16.4–17.5) | 8.5 (8.2–8.8) | 9.2 (8.9–9.6) |
| 01/02 | 11.6 (11.2–12.0) | 12.3 (11.9–12.8) | 6.1 (5.8–6.4) | 6.5 (6.2–6.8) | 15.7 (15.2–16.1) | 16.7 (16.2–17.2) | 8.8 (8.5–9.1) | 9.4 (9.0–9.8) |
| 02/03 | 11.7 (11.3–12.1) | 12.1 (11.7–12.6) | 6.2 (5.9–6.4) | 6.4 (6.1–6.7) | 15.4 (15.0–15.9) | 16.0 (15.5–16.5) | 8.5 (8.2–8.8) | 8.9 (8.5–9.3) |
| 03/04 | 12.5 (12.0–12.9) | 12.7 (12.2–13.1) | 6.6 (6.3–6.9) | 6.8 (6.4–7.1) | 16.9 (16.4–17.4) | 17.2 (16.6–17.7) | 9.3 (9.0–9.7) | 9.5 (9.1–9.9) |
| 04/05 | 12.6 (12.2–13.0) | 12.6 (12.1–13.0) | 6.7 (6.4–7.0) | 6.7 (6.4–7.1) | 17.3 (16.8–17.8) | 17.3 (16.8–17.8) | 9.7 (9.3–10.1) | 9.7 (9.3–10.1) |
| 05/06 | 13.6 (13.1–14.0) | 13.2 (12.8–13.7) | 7.1 (6.8–7.5) | 6.9 (6.6–7.3) | 17.8 (17.3–18.3) | 17.4 (16.9–17.9) | 9.7 (9.4–10.1) | 9.5 (9.1–9.9) |
| 06/07 | 13.5 (13.0–13.9) | 12.8 (12.4–13.3) | 7.5 (7.1–7.8) | 7.1 (6.7–7.4) | 18.1 (17.6–18.6) | 17.3 (16.7–17.8) | 9.8 (9.5–10.2) | 9.3 (8.9–9.7) |
| 07/08 | 13.9 (13.5–14.4) | 12.9 (12.5–13.4) | 7.4 (7.0–7.7) | 6.8 (6.4–7.1) | 18.1 (17.6–18.6) | 16.9 (16.4–17.5) | 10.2 (9.8–10.6) | 9.4 (9.0–9.8) |
| 08/09 | 14.2 (13.7–14.6) | 12.9 (12.4–13.4) | 7.9 (7.5–8.2) | 7.1 (6.7–7.4) | 18.5 (17.9–19.0) | 16.8 (16.3–17.4) | 10.2 (9.8–10.6) | 9.2 (8.8–9.5) |
| Coefficient** | 0.028 | 0.006 | 0.032 | 0.008 | 0.024 | 0.003 | 0.025 | 0.001 |
| (95% CI) | (0.023–0.032) | (0.001–0.011) | (0.026–0.039) | (0.002–0.014) | (0.020–0.028) | (−0.002–0.007) | (0.020–0.030) | (−0.005–0.006) |
| ARC* (95% CI) | 2.8 (2.3–3.3) | 0.6 (0.1–1.1) | 3.3 (2.6–3.9) | 0.8 (0.2–1.4) | 2.5 (2.1–2.9) | 0.3 (−0.2–0.7) | 2.5 (2.0–3.1) | 0.1 (−0.5–0.6) |
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. Age-standardized rates were obtained by considering person-years of 2004/05 as standard population.
↵* ARC stands for annual relative change = (EXP {coefficient} − 1) × 100, where coefficients were estimated from the Poisson regression models.
↵** Coefficients for the standardized rates were obtained from the age-adjusted Poisson regression models.