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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 HarrisComments to Author 
Author affiliations: University of California, Berkeley, California, USA (A. Gordon, A. Reingold, E. Harris); Sustainable Sciences Institute, Managua, Nicaragua (O. Ortega); Ministry of Health, Managua (G. Kuan, S. Saborio, A. Balmaseda)

Main Article

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.

Main Article

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