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 Huang
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.
Page created: September 22, 2011
Page updated: September 22, 2011
Page reviewed: September 22, 2011
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.