Fig. 2From: Predicting poverty. Data mining approaches to the health and demographic surveillance system in Cuatro Santos, NicaraguaCross-validated conditional inference tree with variables in the unsatisfied basic need index excluded. Each end node includes at least 250 individuals. Black areas in end nodes show proportions of poor (2–4 unsatisfied basic needs) and grey areas non-poor (0–1 unsatisfied basic needs). All variables measured at household levelBack to article page