Are Eskimos more or less obese than other Canadians? A comparison of skinfold thickness and ponderal index in Canadian Eskimos

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Abstract
Skinfold thickness, height, and weight measurements were recorded from 1964 through 1970 for more than 1,000 adult Eskimos who resided in the Central and Eastern Canadian Arctic. Among the men and women of all age groups, 70 to 83% had a low ponderal index (PI < 12.5). Nutrition Canada reported similar rates in 200 adult Eskimos and therefore considered Eskimos, especially Eskimo men, as more obese than other Canadians. Thin skinfolds were found in most Eskimo men, including those with a low PI. The usefulness of the PI or other height/weight indices for appraisal of body fatness and prevalence of obesity in different population groups is questioned. Marked sex differences were found in the ratio of the skinfold thickness over the triceps to the mean thickness of two sites on the trunk (subscapular and suprailiac). Thus, use of the arm plus trunk sites provides important information about subcutaneous fat distribution, and comparisons of prevalence of obesity in different sex and age groups based only on arm skinfold measurements may be inappropriate.

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