Annual incidence 1988–97 and prevalence on 31 December 1997 of multiple sclerosis in Västerbotten County per 100 000 population by age and sex
| Incidence (number of cases) | Prevalence (number of cases) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Age group (years) | Female | Male | Total | Female | Male | Total | ||||||
| CI, confidence interval. | ||||||||||||
| 0 to 14 | 0.4 | (1) | 0.4 | (1) | 0.4 | (2) | 0 | 0 | 0 | |||
| 15 to 24 | 8.4 | (14) | 2.9 | (5) | 5.6 | (19) | 34 | (6) | 17 | (3) | 26 | (9) |
| 25 to 34 | 19.2 | (32) | 10.0 | (18) | 14.4 | (50) | 185 | (31) | 110 | (20) | 146 | (51) |
| 35 to 44 | 13.4 | (23) | 8.7 | (16) | 10.9 | (39) | 408 | (67) | 181 | (31) | 292 | (98) |
| 45 to 54 | 7.5 | (12) | 4.2 | (7) | 5.9 | (19) | 402 | (69) | 206 | (38) | 300 | (107) |
| 55 to 64 | 3.1 | (4) | 0 | 1.6 | (4) | 340 | (45) | 146 | (19) | 244 | (64) | |
| 65 to 74 | 0 | 0 | 0 | 249 | (31) | 194 | (21) | 223 | (52) | |||
| 75+ | 0 | 0 | 0 | 113 | (14) | 48 | (4) | 87 | (18) | |||
| Total | 6.7 | (86) | 3.7 | (47) | 5.2 | (133) | 202 | (263) | 105 | (136) | 154 | (399) |
| 95% CI | 6.0 to 8.3 | 2.7 to 4.9 | 4.4 to 6.2 | 179 to 228 | 89 to 125 | 139 to 170 | ||||||