Table 2 Characteristics of the two most likely clusters of multiple sclerosis identified in sensitivity analyses (spatial scan statistic, Brittany, France, 2000–2004)
Radius (km) | Inhabitants | Observed cases | Expected cases | p value | |
|---|---|---|---|---|---|
RRMS (n = 591) | |||||
Primary cluster | 15.6 | 36,932 | 0 | 7.05 | 0.60 |
Secondary cluster | 10.0 | 20,857 | 13 | 4.34 | 0.98 |
Municipality of residence ≤ 1 year after clinical onset (n = 728) | |||||
Primary cluster | 30.8 | 195,187 | 22 | 47.68 | 0.16 |
Secondary cluster | 37.1 | 288,708 | 41 | 69.84 | 0.49 |
RRMS and municipality of residence ≤ 1 year after clinical onset (n = 516) | |||||
Primary cluster | 16.4 | 40,516 | 0 | 6.86 | 0.68 |
Secondary cluster | 30.8 | 195,187 | 15 | 33.53 | 0.71 |