Targeting urban malnutrition: a multi-city analysis of the spatial distribution of childhood nutritional status

This paper assesses the degree to which childhood malnutrition and its cont ributing factors are clustered by neighborhood in seven different cities in Africa, Asia, and Latin America. The analysis is based on data from eight different national household surveys that used a two-stage sampling design (households within clusters). Spatial clustering was assessed using the int racluster correlation coefficient (rho), which may be interpreted as the ex pected correlation between any randomly selected pair of observations drawn from the same cluster. In general, per capita expenditure and the share of the household budget spent on food showed relatively high spatial clusteri ng across the seven cities, but the magnitude of this clustering varied mar kedly from city to city. Spatial clustering in the provision of basic servi ces also varied greatly. There was consistently little evidence of spatial clustering of infectious disease, childhood mortality, or the weight-based nutrition indicators. Age-standardized height, on the other hand, showed a little more spatial clustering, with a median intracluster correlation of r ho =0.12. Some cities showed relatively higher levels of spatial clustering on several measures of deprivation simultaneously, while other cities show ed consistently lower levels of clustering. Many nutrition interventions ar e intrinsically geographically targeted. While geographical targeting tends to be administratively simpler than individual targeting and can be politi cally convenient, the current analysis suggests that where nutrition interv entions are focused on stunting (low height-for-age), targeting by neighbor hood may often lead to unacceptably high rates of under-coverage and leakag e of benefits to the non-needy. (C) 2000 Elsevier Science Ltd. All rights r eserved.