Volume 19, Number 1—January 2013
Research
Seroepidemiologic Effects of Influenza A(H1N1)pdm09 in Australia, New Zealand, and Singapore
Table 3
Postpandemic seropositive proportions by country, region, and risk group of influenza A (H1N1) 2009 in the Southern Hemisphere, winter 2009, with age-characterized AR*
Code |
Pop. |
Age groups, y |
Sex |
Overall |
Age stand. AR |
|||||||||
0–4 |
5–14 |
15–34 |
35–54 |
55–74 |
≥75 |
F |
M |
Raw |
Age stand. |
|||||
A, B, E, I, K, N, O, P, R, S | Overall | 27.6 | 34.3 | 30.5 | 16.8 | 18.0 | 23.3 | 23.0 | 22.3 | 23.8 | 24.3 | 14.9 | ||
I, K, N, O, P, R | AU | 24.0 | 32.2 | 29.8 | 17.8 | 18.8 | 17.0 | 23.3 | 21.2 | 23.1 | 23.7 | 13.1 | ||
B | NZ | 37.2 | 46.3 | 38.1 | 22.3 | 20.1 | 35.8 | 30.5 | 30.1 | 30.3 | 30.8 | 19.0 | ||
E, S | Sing. | 24.5 | 29.6 | 17.2 | 11.0 | 6.8 | 10.7 | 13.4 | 19.2 | 17.5 | 14.0 | |||
K, N | NSW | 17.3 | 18.4 | 37.8 | 19.3 | 18.8 | 21.6 | 25.5 | 24.2 | 26.2 | 27.2 | 15.3 | ||
P | NT | 16.7 | 37.2 | 22.0 | 18.1 | 16.3 | 14.3 | 20.5 | 18.3 | 19.5 | 21.8 | 15.0 | ||
N | QLD | 29.6 | 9.3 | 14.8 | 19.2 | 18.0 | 18.5 | |||||||
N | Tas | 35.9 | 28.9 | 26.7 | 35.6 | 24.5 | 30.6 | |||||||
N, O | Vic | 36.1 | 30.8 | 12.5 | 21.4 | 31.3 | 13.6 | 21.5 | ||||||
I, N, R |
WA |
24.0 |
39.5 |
31.6 |
18.2 |
34.3 |
27.4 |
27.5 |
31.4 |
30.3 |
20.5 |
|||
Risk group collections |
||||||||||||||
M | NSW, HIV+ | 29.5 | 30.4 | 35.6 | 28.4 | |||||||||
Q | NSW, hemo. | 21.7 | 25.0 | 20.8 | 22.0 | 21.5 | ||||||||
C | NZ, HCWs | 31.3 | 23.7 | 27.6 | 33.3 | 26.3 | 28.2 | 26.7 | ||||||
F | Sing. HCWs | 11.0 | 6.8 | 11.1 | 10.1 | 6.3 | 9.5 | |||||||
G | Sing. res. care | 4.3 | 2.7 | 6.8 | 11.4 | 4.9 | 9.4 | 6.8 | ||||||
H | Sing. military | 35.7 | 3.4 | 34.5 | 33.9 | |||||||||
J | WA, preg. women | 13.3 | 19.2 | 14.7 | 14.7 | |||||||||
P | NT, indig. | 37.5 | 28.4 | 28.1 | 32.9 | 28.4 | 30.9 | 29.5 | 29.8 | 22.1 | ||||
B | NZ, Maori | 42.3 | 26.2 | 20.6 | 39.4 | 28.0 | 34.3 | |||||||
B |
NZ, Pacific People |
56.0 |
55.6 |
53.1 |
39.5 |
24.3 |
43.6 |
45.1 |
43.7 |
|||||
Overall attack rates, community-based studies |
||||||||||||||
A, B, E, I, K, N, O, P, R, S |
Overall |
26.2 |
31.6 |
18.5 |
12.1 |
6.4 |
–24.1 |
15.2 |
13.7 |
15.3 |
14.9 |
|||
Overall geometric mean titers, community-based studies |
||||||||||||||
A, E, I, N, P, R, S | Pre | 6.03 | 5.86 | 8.63 | 6.97 | 8.57 | 24.13 | 15.2 | 13.7 | 15.3 | 14.9 | |||
A, B, E, I, K, N, O, P, R, S | Post | 15.42 | 16.87 | 16.09 | 10.10 | 11.29 | 14.74 | 15.2 | 13.7 | 15.3 | 14.9 |
*Results are expressed as % (95% CI). AR, attack rate; Pop., population; Age-stand, age-standardized; AU, Australia; NZ, New Zealand; Sing., Singapore; NSW, New South Wales; NT, Northern Territory; QLD, Queensland; Tas, Tasmania; Vic, Victoria; WA, Western Australia; HCWs, health care workers; hemo., hemodialysis; res., residential; preg., pregnant; indig., indigenous; pre, prepandemic; post, postpandemic. Blank cells indicate no data.
1A list of the group’s members can be found at the end of this article.