Number of cases of multiple sclerosis, incidence per 100 000 person-years in the age group 10 to 69 years, and standardised incidence ratios by calendar time, district, and disease course, 1979 to 1993
| Calendar time | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1979 to 1986 | 1987 to 1993 | 1979 to 1993 | |||||||||
| District | Disease course | N | I | SIR | N | I | SIR | CI | N | I | CI |
| CI, confidence interval; I, incidence; N, number of cases; PPMS, primary progressive multiple sclerosis; RRMS, relapsing-remitting multiple sclerosis; SIR, standardised incidence ratio. | |||||||||||
| Uusimaa | RRMS | 301 | 4.1 | Reference | 290 | 4.2 | 1.0 | 0.9 to 1.2 | 591 | 4.1 | 3.8 to 4.5 |
| PPMS | 75 | 1.0 | Reference | 70 | 1.0 | 1.0 | 0.8 to 1.3 | 145 | 1.0 | 0.8 to 1.2 | |
| Total | 376 | 5.1 | Reference | 360 | 5.2 | 1.0 | 0.9 to 1.1 | 736 | 5.1 | 4.8 to 5.5 | |
| Vaasa | RRMS | 42 | 4.2 | Reference | 27 | 3.1 | 0.7 | 0.5 to 1.1 | 69 | 4.0 | 3.0 to 4.9 |
| PPMS | 19 | 1.9 | Reference | 2 | 0.2 | 0.1 | 0.02 to 0.4 | 21 | 1.2 | 0.7 to 1.7 | |
| Total | 61 | 6.0 | Reference | 29 | 3.3 | 0.5 | 0.4 to 0.8 | 90 | 5.2 | 4.1 to 6.3 | |
| Seinäjoki | RRMS | 83 | 6.8 | Reference | 85 | 7.9 | 1.2 | 0.9 to 1.4 | 168 | 8.1 | 6.9 to 9.3 |
| PPMS | 32 | 2.6 | Reference | 40 | 3.7 | 1.4 | 1.02 to 1.9 | 72 | 3.5 | 2.7 to 4.3 | |
| Total | 115 | 9.4 | Reference | 125 | 11.6 | 1.2 | 1.03 to 1.5 | 240 | 11.6 | 10.1 to 13.1 | |