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Table 3 Positive predictive value of having influenza virus given ILI symptoms stratified by age group and enrollment month.

From: Evaluation of an influenza-like illness case definition in the diagnosis of influenza among patients with acute febrile illness in cambodia

Age (years)

2-6

7-18

>18

p-value

July

4

16

9

.10

August

22

24

19

.78

September

60

59

26

<.0001

October

65

73

33

<.0001

November

53

52

20

<.001

December

9

32

7

<.0001

OVERALL

44

49

21

<.0001