TABLE 2.

Association between expressed serogroup and disease, adjusted for country and year

SerogroupOdds ratio (95% confidence interval)
All isolates (n = 667)Excluding nongroupable isolates (n = 523)
Other (not B, C, Y, or W135)1 (baseline)1 (baseline)
B vs other47 (14-156)20 (4-98)
C vs other671 (166-2720)274 (48-1572)
Y vs other5 (1.0-20.2)1.9 (0.3-11.8)
W135 vs other35 (6-198)14 (2-113)
C vs B14 (6-34)14 (6-33)