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Fig. 4 | BMC Medicine

Fig. 4

From: Estimating the annual dengue force of infection from the age of reporting primary infections across urban centres in endemic countries

Fig. 4

The city and study period aggregated association between the average annual FOI and surveillance metrics. A Crude incidence. B Under five incidence. C Under 10 incidence. D Mean age of case reports. E Mean age of case reports with warning signs. F Mean age of case reports with severe dengue. G Mean age of active infections. H Mean age of primary dengue infections. I Mean age of post-primary dengue infections. ρ Pearson’s R. AF Data from passive surveillance. GI Data from laboratory surveillance. Red dash: predicted FOI according to regression models for metrics with statistically significant associations with FOI (ρ, p value>0.05). Linear regression models were favoured for crude incidence while exponential regression models had superior model fits for mean case report age, case report with warning signs age, active DENV age, primary DENV age and post-primary DENV age (Lrtest, p value<0.05). X refers to the annual mean surveillance metric

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