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Volume 17, Number 10—October 2011

Dispatch

Household Transmission of Pandemic (H1N1) 2009 Virus, Taiwan

Luan-Yin Chang, Wei-Hua Chen, Chun-Yi Lu, Pei-Lan Shao, Tsui-Yien Fan, Ai-Ling Cheng, and Li-Min HuangComments to Author 

Author affiliation: National Taiwan University, Taipei, Taiwan

Main Article

Table 2

Pandemic (H1N1) 2009 attack rates among 223 household contacts of 87 index patients, by patient characteristics and symptoms, Taiwan, August–November 2009*

Characteristic Attack rate, % OR (95% CI)† p value†
Sex 0.21
M, n = 101 23 Reference
F, n = 122 30 1.48 (0.81–2.70)
Age, y <0.0001
>18, n = 166 15 Reference
<18, n = 57 61 9.09 (4.55–17.86)
Signs and symptoms
Fever <0.0001
No, n = 163 12 Reference
Yes, n = 60 68 16.13 (7.87–33.33)
Cough <0.0001
No, n = 158 13 Reference
Yes, n = 65 60 10.42 (5.29–20.83)
Rhinorrhea <0.0001
No, n = 176 19 Reference
Yes, n = 47 55 5.18 (2.60–10.31)
Sore throat 0.0002
No, n = 176 21 Reference
Yes, n = 47 49 3.60 (1.83–7.09)
Vomiting 0.06
No, n = 214 26 Reference
Yes, n = 9 56 3.60 (0.93–13.90)
Diarrhea 0.23
No, n = 214 26 Reference
Yes, n = 9 44 2.30 (0.60–8.85)
Malaise 0.002
No, n = 200 24 Reference
Yes, n = 23 57 4.20 (1.73–10.20)
Myalgia 0.02
No, n = 192 24 Reference
Yes, n = 31 45 2.61 (1.20–5.71)

*OR, odds ratio; CI, confidence interval.
†Univariate logistic regression model was used for unadjusted OR (95% CI) and unadjusted p values. If features were significantly different with p<0.05 in univariate logistic regression model, they were further analyzed with multiple logistic regression model for adjusted OR (95% CI) and adjusted p values.

Main Article

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