TABLE II. Influenza B detection by age groups.

Age groups (years)	Samples tested n	Influenza B n (%)	Odds ratio (95% CI)
0-12	1,075	37 (3.4)	3.60 (0.49-26.52)
13-18	65	12 (18.5)	22.87 (2.90-180.66)a
19-65	1,750	64 (3.6)	3.8 (0.53-27.92)
> 65	102	1 (1)	1 (Ref)

a: significant at p < 0.05; CI: confidence interval; p: < 0.001.