Estimated direct medical cost and quality-of-life associated with ILI and clinically diagnosed flu patients in Belgium, as a function of significant predictor variables (gender, underlying condition ‘cond’, age and/or vaccination status (‘vac’ = vaccinated just before or during the last flu season)

95% uncertainty intervals are obtained by bootstrapping (1000 samples). #Age was included as continuous predictor variable in the regression models but for clarity this table presents estimates for only 3 ages (in years).