Table 3

Cases and controls by age group, sex, month of swab collection, year and type/subtype, 2007-2008

2007

2008



Controls

Influenza cases (%)

Controls

Influenza cases (%)



(%)

All

A/H1

A/H3

B

(%)

All

A/H1

A/H3

B


Age group (years)

0-4

7 (4)

7 (4)

3 (7)

4 (3)

0

4 (2)

5 (5)

0

1 (3)

3 (5)

5-19

22 (11)

42 (22)

12 (27)

24 (21)

6 (23)

37 (17)

28 (27)

0

6 (16)

22 (37)

20-49

126 (66)

113 (58)

25 (56)

68 (58)

17 (65)

140 (63)

57 (54)

3 (75)

18 (47)

33 (56)

50-64

28 (15)

22 (11)

4 (9)

14 (12)

2 (8)

30 (13)

11 (10)

1 (25)

9 (24)

1 (2)

≥ 65

9 (5)

10 (5)

1 (2)

7 (6)

1 (4)

13 (6)

4 (4)

0

4 (11)

0

Sex

Female

89 (46)

96 (49)

20 (44)

62 (53)

12 (46)

105 (47)

55 (52)

1 (25)

19 (50)

34 (57)

Male

103 (54)

98 (51)

25 (56)

55 (47)

14 (54)

119 (53)

51 (48)

3 (75)

19 (50)

26 (43)

Month of swab collection

March

2 (1)

2 (1)

0

1 (< 1)

1 (4)

0

0

0

0

0

April

5 (3)

1 (< 1)

0

1 (< 1)

0

6 (3)

0

0

0

0

May

14 (7)

1 (< 1)

1 (2)

0

0

28 (13)

3 (3)

0

0

3 (5)

June

13 (7)

4 (2)

1 (2)

3 (3)

0

33 (15)

3 (3)

0

0

3 (5)

July

48 (25)

50 (26)

10 (22)

31 (27)

7 (27)

32 (14)

9 (8)

0

3 (8)

5 (8)

August

66 (34)

94 (48)

30 (67)

56 (48)

4 (15)

69 (31)

42 (40)

4 (100)

17 (45)

21 (35)

September

37 (19)

30 (15)

3 (7)

23 (20)

4 (15)

42 (19)

43 (41)

0

14 (37)

27 (45)

October

7 (4)

12 (6)

0

2 (2)

10 (38)

13 (6)

6 (6)

0

4 (11)

1 (2)

November

0

0

0

0

0

1 (< 1)

0

0

0

0


Total

192

194

45

117

26

224

106a

4

38

60a


a Age unknown for one case

Fielding et al. BMC Infectious Diseases 2011 11:170   doi:10.1186/1471-2334-11-170

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