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Table 4 Odds ratios (95 % confidence intervals) of AOM associated with different demographic and clinical characteristics of the child

From: Incidence of acute otitis media in children below 6 years of age seen in medical practices in five East European countries

Characteristics Categories Crude OR (95 % CI) Adjusted OR (95 % CI)
Age [Months] - 1.02 (1.01–1.03) 1.00 (0.99–1.01)
Gender Male Reference Reference
Female 1.02 (0.79–1.31) 1.02 (0.79–1.32)
Child receive at least one dose of a Pneumococcal vaccine No Reference Reference
Yes 0.98 (0.74–1.29) 1.04 (0.78–1.38)
Breast-fed No Reference Reference
Yes 0.12 (0.05–0.26) 0.19 (0.08–0.44)
Number of household siblings 0 Reference Reference
≥ 1 1.38 (1.06–1.81) 1.20 (0.91–1.58)
Child care/school attendance No Reference Reference
Yes 2.68 (2.03–3.54) 1.92 (1.35–2.75)
Premature (< 37 weeks gestation) No Reference Reference
Yes 0.73 (0.38–1.42) 0.76 (0.39–1.49)
Allergies No Reference Reference
Yes 1.80 (1.22–2.66) 1.64 (1.09–2.45)
Child regularly exposed to cigarettes smoke indoors No Reference Reference
Yes 1.04 (0.66–1.62) 1.02 (0.65–1.62)
  1. AOM acute otitis media, CI confidence interval, OR odds ratio, 95 % CI of OR 95 % Wald confidence interval of odds ratio