Contribution of vector abundance and socioeconomic/climatic factors in explaining log incidence of DHF averaged over diverse durations, revealed by GAM.

†df: degree of freedom; ‡ Akaike's Information Criterion; § APET: average pan evapo-transpiration (mm/day). Socioeconomic variables are defined in the text. Variable “public large wells” was assigned df = 3. All other independent variables were assigned df = 2. *: P<0.05, **: P<0.01, ***: P<0.001.