Community-based survey versus sentinel site sampling in determining the nutritional status of rural children. Implications for nutritional surveillance and the development of nutritional programmes.

A study of the anthropometric status of under-5-year-olds was conducted in the Nqutu district of KwaZulu by means of a representative community-based sample and concurrent samples from primary health care clinics, preschools and primary schools. The first objective of this exercise was to determine the extent of acute nutritional stress in the district as an indication of the appropriateness of food relief efforts in the region. The absence of wasting and the high prevalence of stunting (37.5%) in the community-based sample suggested that the main problem is chronic socio-economic underdevelopment, rather than a severe or immediate lack of food. The fact that fewer than 20% of households are in any way reliant on domestic production for their maize requirements explains why the recent drought has not had a greater impact on the nutritional status of this vulnerable group. This study confirms that the more recent emphasis of the National Nutrition and Social Development Programme on social development is appropriate. An equally important objective of this study was to evaluate the usefulness of clinics, preschools and schools as sites for the collection of anthropometric data and the development of nutritional programmes. This preliminary attempt to develop the methodology for district-based nutrition surveillance suggested that all these sites have limitations both in respect of data collection and community access. The implications of using these sites and the developments needed to improve their usefulness in a future nutrition surveillance system are discussed.