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. 2018 Mar 23;12(4):533–543. doi: 10.1111/irv.12550

Table 3.

Relative risk of influenza type B detection among the elderly in comparison with younger age‐classes

Location [Ref] Elderly vs children Elderly vs adolescents Elderly vs children/adolescents Elderly vs adults
Hong Kong39 0.65 0.33 0.48 0.67
Vietnam40 NA NA 0.94 1.18
Finland41 0.70 0.31 0.44 0.42
Australia27 0.91 0.66 0.73 1.04
Chile27 0.71 0.31 0.47 0.94
China (North)27 0.66 0.77 0.73 0.95
China (South)27 0.89 0.93 0.92 1.05
El Salvador27 0.89 1.51 1.16 1.79
England27 0.95 0.66 0.71 0.87
Guatemala27 0.91 0.88 0.90 2.27
Italy27 0.81 0.27 0.37 0.83
New Zealand27 0.57 0.36 0.43 0.70
Nicaragua27 0.42 0.39 0.40 2.92
Singapore27 0.96 0.64 0.66 0.96
Vietnam27 1.00 0.82 0.91 1.16
Canada (Manitoba)42 0.51 0.26 0.39 0.43
France43 1.29 0.90 1.03 1.35
Hong Kong44 0.58 0.45 0.52 1.05
Hong Kong45 0.80 0.48 0.61 1.01
China (Shanghai)46 0.91 0.77 0.81 0.98
Egypt47 1.29 1.05 1.14 1.28
China (Chongqing)48 0.74 0.48 0.55 1.17
Germany28 1.17 0.59 0.71 0.94
Spain (Madrid)29 1.11 0.49 0.83 1.25
Canada (Toronto)49 NA NA 0.96 1.38
Australia30 0.93 0.59 0.68 0.95
United States51 0.86 NA 0.67a 0.91
a

The age category is 5‐24 y; it therefore also includes young adults.