TABLE 2.
Carriage rates for nongroupable isolates at any visit
| Method | No. of subjects with positive non-NmB meningococcal carriage at any visit/no. ofsubjects with ≥1 culture performed at any visit (% [95% CIa]) by cohort: |
|
|---|---|---|
| Ninth-grade students | University students | |
| Seroagglutination | 36/533 (6.8 [4.8, 9.2]) | 79/360 (21.9 [17.8, 26.6]) |
| Isolate PCR | 21/533 (3.9 [2.5, 6.0]) | 44/360 (12.2 [9.0, 16.1]) |
| P valueb | 0.001 | <0.001 |
a
95% Clopper-Pearson 2-sided CI.
b
McNemar test using exact method is used to compare the prevalence rate between PCR and culture/seroagglutination at each visit.