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Measurement variability estimates for 18 different anthropometric dimensions were collected within the context of an ongoing longitudinal in vestigation of preschool Guatemalan children. Estimates of total measurement variance, intra-observer variance, and short-term intra-subject variance are presented for each variable. A simple procedure for the evaluation of measurement variance in cross-sectional and longitudinal investigations is described in which the total measurement variance is expressed as a percentage of the appropriate inter-subject variance. This statistic serves as an index of the relative reproducibility of anthropometric variables.
Martorell et al. (Sat,) studied this question.