Prevalence of RA according to age distribution
| Age class (years) | Rate (%) | 95% CI |
|---|---|---|
| 18–24 | 0.00 | . |
| 25–34 | 0.13 | 0.003 to 0.47 |
| 35–44 | 0.11 | 0.003 to 0.39 |
| 45–54 | 0.67 | 0.18 to 1.46 |
| 55–64 | 0.44 | 0.14 to 0.89 |
| 65–74 | 0.79 | 0.36 to 1.39 |
| 75–84 | 0.10 | 0.002 to 0.36 |
| 85+ | 0.00 | . |