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Table 1 Characteristics of participants included in the analysis

From: Epidemiology and burden of influenza in healthy children aged 6 to 35 months: analysis of data from the placebo arm of a phase III efficacy trial

  South Africa Philippines European countries a Overall
Characteristic N = 239 N = 1469 N = 502 N = 2210
Male/female ratio 1.37 1.05 1.03 1.10
Age (months), mean ± standard deviation 19.7 ± 7.9 19.9 ± 8.6 20.0 ± 8.2 19.9 ± 8.4
  1. aFrance, Greece, Italy, Spain, and Romania