Table 2.

Meta-regression for primary outcome

	Estimate	Standard error	P-value
Influenza A and B
(Intercept)	0.044	0.012	0.0012
Children vs. Adults	0.110	0.019	<0.0001
Influenza A
(Intercept)	0.034	0.011	0.005
Children vs. Adults	0.088	0.018	<0.0001
Influenza B
(Intercept)	0.011	0.0055	0.046
Children vs. Adults	0.044	0.009	<0.0001