Chapter 2 Table 2.7 Characteristics of Commonly Used Anthropometric Indicators Basis of measurement Reference standard Grading of status Characteristics Weight-for-age NCHS growth standards Normal +2 to -2SD Widely used and understood. Combines effects of (median) Moderate <-2SD past and present episodes of disease/malnutrition Severe <-3SD Height-for-age NCHS growth standards Normal +2 to -2SD Integrates effects over whole of life up to age of (median) Moderate <-2SD measurements. Insensitive to acute episodes. Severe <-3SD Weight-for-height NCHS growth standards Normal +2 to -2SD Indicates current or recent episodes, insensitive to Moderate <-2SD small but normal proportioned individuals (median) Severe <-3SD Mid-upper arm Single figure of 16.5cm Normal >13.5cm Indicates current or recent episodes. Fast, cheap, circumference for all children between 1 Moderate 12.5-13.5cm reliable (with careful training). Good predictor of and 5 years Severe <12.5cm mortality risk. Needs only approximate ages. Source: WHO, Measuring Change in Nutritional Status, Guidelines for assessing the nutritional impact of supplementary feeding programmes for vulnerable groups.Geneva, 1983. WHO, Physical Status: the use and interpretation of anthropometry. WHO Technical Report Series No. 854. Geneva, 1996. - 53-