From: Return of pandemic H1N1 influenza virus
Variable
Odds ratio
p-value
Period 2009–10 (Reference)
1
Period 2010-12
(1.33-4.77) 2.52
0.0045
Period 2010-13
(4.53-11.5) 7.21
<.0001
Age (as continuous)
1.01 (0.99-1.04)
0.3486