Table 3 Adjusted logistic regression models with clinical features associated with AH1N1 infection in persons with flu symptoms who received medical care in San Luis Potosi from March 15 to October 30, 2009, stratified by age group
Variables included in the final model | 0-14 years (n = 2698) | ≥15 years (n = 3430) | ||||
|---|---|---|---|---|---|---|
| Â | Coefficient | Adjusted OR [95% CI] | P-value | Coefficient | Adjusted OR [95% CI] | P-value |
Age in years | 0.07 | 1.07 [1.05-1.10] | 0.000 | −0.02 | 0.98 [0.97-0.98] | 0.000 |
Fever | – | – | – | 0.80 | 2.23 [1.41-3.54] | 0.001 |
Cough | 0.46 | 1.59 [1.12-2.24] | 0.009 | 0.57 | 1.78 [1.19-2.67] | 0-005 |
Headache | 0.50 | 1.65 [1.21-2.25] | 0.001 | – | – | – |
Clear rhinorrhea | 0.26 | 1.30 [1.08-1.57] | 0.005 | 0.41 | 1.50 [1.28-1.77] | 0.000 |
Arthralgia | – | – | – | −0.20 | 0.81 [0.69-0.96] | 0.014 |
Seasonal flu vaccine | – | – | – | −0.31 | 0.73 [0.57-0.93] | 0.011 |
Contact with infected | 0.52 | 1.68 [1.33-2.13] | 0.000 | – | – | – |
Conjunctivitis | 0.25 | 1.29 [1.07-1.56] | 0.007 | – | – | – |
Dyspnea | −0.65 | 0.51 [0.35-0.75] | 0.001 | −0.31 | 0.73 [0.59-0.90] | 0.003 |
Purulent rhinorrhea | −0.75 | 0.47 [0.28-0.78] | 0.004 | – | – | – |
Leukocytosis | −2.56 | 0.07 [0.00-0.62] | 0.017 | – | – | – |
Intercept | −1.61 |  |  | −1.11 |  |  |