Volume 15, Number 3—March 2009
Research
Prevalence and Seasonality of Influenza-like Illness in Children, Nicaragua, 2005–2007
Aubree Gordon, Oscar Ortega, Guillermina Kuan, Arthur Reingold, Saira Saborio, Angel Balmaseda, and Eva Harris
Table 3
Risk factors for influenza-like illness in cohort of 4,276 children 2–11 years of age, Managua, Nicaragua, 2005–2007*
| Characteristic | Crude RR† | 95% CI | Adjusted RR†‡ | 95% CI |
|---|---|---|---|---|
| Sex | ||||
| M | 0.94 | 0.85–1.04 | 0.95 | 0.87–1.04 |
| F |
Ref |
Ref |
||
| Age, y | ||||
| 2 | 5.94 | 4.49–7.85 | 5.53 | 4.19–7.32 |
| 3 | 4.67 | 3.56–6.12 | 4.39 | 3.35–5.75 |
| 4 | 3.46 | 2.63–4.54 | 3.29 | 2.51–4.32 |
| 5 | 2.67 | 2.03–3.53 | 2.58 | 1.96–3.41 |
| 6 | 2.30 | 1.74–3.03 | 2.24 | 1.70–2.95 |
| 7 | 2.13 | 1.61–2.83 | 2.09 | 1.58–2.77 |
| 8 | 1.52 | 1.12–2.04 | 1.49 | 1.11–2.01 |
| 9 | 1.51 | 1.13–2.03 | 1.50 | 1.12–2.01 |
| 10 | 1.23 | 0.91–1.67 | 1.23 | 0.91–1.66 |
| 11 |
Ref |
Ref |
||
| Asthma | ||||
| Yes | 2.23 | 1.92–2.59 | 1.79 | 1.56–2.06 |
| No | Ref | Ref |
*RR, relative risk; CI, confidence interval; Ref, reference.
†The measure of RR used is the incidence rate ratio.
‡Multivariate model included sex, age, and asthma status.
