The merits of three indices based on weight (W) and height (H) were examined in the age group six to 15 years: W/H, W/H2, W/H3. The analysis was based ona survey of 1673 schoolchildren of both sexes from a rural housing block in Delhi. It showed that the index W/H2 was invariant with age in the range six to 15 years and that the other two indices were biased with respect to age. The index W/H2 was found to be of value for the proper assessment of nutritional status in the schoolchildren of a developing country.
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