Previous reports of prevalence and incidence of RA and AS.
| Variables | RA | AS |
|---|---|---|
| Prevalence | 437/100,000: Oslo, Norway19 | 260/100,000: Northern Norway8 |
| 1115–2660/100,000: Older women, Sweden27 | ∼225/100,000: Northern/Western Sweden31 | |
| 430–1470/100,000: Older men, Sweden27 | 140/100,000: Southern Sweden32 | |
| 620/100,000: Minnesota, USA28 | 190/100,000: Men, Southern Sweden32 | |
| 720/100,000: Minnesota, USA 28 | 87/100,000: Women, Southern Sweden32 | |
| 230/100,000: Men, Italy29 | 210/100,000: Ontario, Canada33 | |
| 570/100,000: Women, Italy29 | ||
| Incidence | 0.41/1000: Sweden3 | 0.07/1000: Northern Norway8 |
| 0.25/1000: Men, Sweden3 | 0.15/1000: Ontario, Canada33 | |
| 0.56/1000: Women, Sweden3 | 0.06/1000: Czech Republic34 | |
| 0.28/1000: Men, Norfolk, UK30 | 0.07/1000: Finland35 | |
| 0.59/1000: Women, Norfolk, UK30 | ||
| 0.41/1000: Minnesota, USA28 | ||
| 0.28/1000: Men, Minnesota, USA28 | ||
| 0.53/1000: Women, Minnesota, USA28 | ||
| 0.26/1000: Oslo, Norway7 | ||
| 0.14/1000: Men, Oslo, Norway7 | ||
| 0.37/1000: Women, Oslo, Norway7 |
RA: rheumatoid arthritis; AS: ankylosing spondylitis.