Table 2.
P Values for Various Predictors of Measles Transmissibility
| Variable | P Value | P Value | P Value |
|---|---|---|---|
| (Including Outbreak A) | (Excluding Outbreak A) | (Outbreaks With 1 Index Case) | |
| Genotype (B3 vs not) | .01 | .04 | … |
| Season of introduction (winter vs not) | .01 | .03 | … |
| Age of index case (school-aged vs not) | … | … | <.001 |
| Vaccine status of index case (vaccinated vs unvaccinated or unknown status) | … | … | .12 |
| Random effect of genotype | .004* | .02* | … |
| Random effect of season | .14* | .42* | … |
Starred P values are χ2 likelihood ratio P values. All other P values are permutation P values.