ACL BPS J. chron. Dis. 1965, Vol. 18, pp. 1291-1307. Pergamon Press Ltd. Printed in Great Britain IN NORMAL ADULTS—II A SIMPLE CLINICAL METHOD TO ESTIMATE BODY FAT AND LEAN BODY MASS R. C, STEINKAMP, M.D.*, N. L. CoHEeN, M.P.H.t, W. R. GAFFEY, Ph.D.f, T. McKey, B.S.§, G. BRon, B.S.§, W. E. Srri**, T. W. SARGENT, Ph.D.++ and E. Isaacs, M.A.tt California State Department of Public Health, Bureau of Public Health Nutrition, and the Donner Laboratory, University of California, Berkeley, California A VALID and simple anthropometric method to estimate body fat and lean body mass can enhance the clinician’s armamentarium. By use of such a method in an epidemiological study of chronic diseases associated with overweight, obesity (excess body fat) can be distinguished from overweight (body weight greater than a standard weight for height and sex). This paper presents the development of regression equations which estimate body fat and lean body mass in adults. Equations are based on anthropometry and laboratory measures of body fat by the total body water—body-density technique in healthy adults; the methods are described in detail in the preceding paper [1]. Potassium-40 (K*°) and cesium-137 (Cs'3") were measured in an Argonne-type whole body counter. Calculations of body composition from results of total body water-body density and K*°® counting are correlated and discussed. The measurements made in this study have been utilized to compare body composition as estimated by several anthropometric equations developed on other population groups. Supported in part by National Institutes of Health Grant CD 00009 (formerly A-5907). *Medical Consultant, Bureau of Public Health Nutrition, CSDPH. *Public Health Statistician, Bureau of Public Health Nutrition, CSDPH. tStatistical Consultant, Division of Research, CSDPH. §Research Assistant, Bureau of Public Health Nutrition, CSDPH. **Physicist to the Donner Laboratory, University of California, Berkeley. ttStaff Biophysicist, Donner Laboratory, University of California, Berkeley. tiResearch Assistant, Donner Laboratory, University of California, Berkeley. 1291 ne eeet me eeerknny oe (Received 15 November 1964) meen eee ein de he Se anittinnERIE<1,sta!SaasSEs. Sie MEASURES OF BODY FAT AND RELATED FACTORS

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