Table 2.

Results of multiple linear regression by age group: fit of the model (R²), significant contributors to probable meningococcal disease, and number of probable cases associated with a single confirmed case of serogroup C (α)

n.a., Not available as serogroup C not significant contributor of probable disease in this group.

^*All organisms identified as causing symptoms that mimic meningococcal disease were fitted to the model but only retained if found to be significant (P<0·05).