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Abstract
Factors associated with poor outcome of acute otitis media (AOM) were analysed in 131 children aged 1/4 to 7 1/2 (median 21/2) years. After AOM, altogether 37 (28%) of the children had poor outcome: 15 children (12%) clinical failure (unimprovement or worsening of pre-treatment signs and symptoms within 2 weeks of onset of therapy) and 31 (24%) persistent middle ear effusion (MEE) 1 month post-treatment. Of the different variables studied in multivariate analysis, age <2 years (p <0.01), history of allergic skin or respiratory symptoms (p =0.02), 6 h duration of pre-treatment earache (p =0.01) and B. catarrhalis in MEE (p = 0.05) were associated with clinical failure. Children with previous adenotomy or unilateral AOM had no failures. Persistence of MEE at 1 month was associated with age < 2 years (p = 0.05), otitis proneness (p = 0.03), bilaterality of AOM (p < 0.01) and S. pneumoniae in MEE (p = 0.01) in univariate but not in multivariate analysis.