Growth of upper- and lower-body segments in Patamona and Wapishana Amerindian children (cross-sectional data).

PRIMARY OBJECTIVE: To describe the upper- and lower-body growth of two populations of lowland Amazonian Amerindian children. RESEARCH DESIGN AND METHODS: The stature and sitting height of a convenience sample of 659 Patamona and 543 Wapishana children of known ages between 0 and 16 years of age was collected using standard techniques. Subischial leg length was calculated as stature less sitting height. The raw data were compared with reference data of British children, and body segment z-score values were calculated. RESULTS: The data suggest that Amerindian children were significantly shorter than their British contemporaries, and that considerable faltering in total stature occurred by the third year of life. However, there were contrasting patterns of faltering in the upper and lower body which may well reflect differences in the tempo of growth of body segments at different ages. The two study populations differed significantly in their total stature and this was shown to be due to significant differences in leg length but not in sitting height. CONCLUSIONS: The adverse effects on childhood growth of poor environmental conditions are well known, and it is argued that the variation in body size found between the populations in this study were the results of marked differences in the quality of their living conditions. This paper provides baseline data on the growth of Amerindian populations that are currently facing unprecedented changes in their economic and environmental circumstances.