Body composition analysis by bioelectrical impedance in chronic maintenance dialysis patients: comparisons to the National Health and Nutrition Examination Survey III.
OBJECTIVE
To compare bioelectrical impedance analysis derived parameters in chronic maintenance dialysis patients to those obtained in National Health and Nutrition Examination Survey (NHANES) III.


METHODS
Cross-sectional nutritional surveillance study.


METHODS
Hospital-based, not-for-profit chronic maintenance dialysis center.


METHODS
A total of 913 chronic maintenance dialysis patients and a subset of 10,263 subjects from NHANES III who underwent bioelectrical impedance analysis. Independent (Predictor) Variables: Bioelectrical impedance parameters including resistance, reactance, phase angle, and total body capacitance.


METHODS
Total body water, intracellular and extracellular water, body cell mass, fat free mass, fat mass.


RESULTS
Relative to NHANES III, end-stage renal disease patients have lower resistance (3%), reactance (26%), phase angle (28%); and intracellular water (9%) values, whereas extracellular water content is 17% higher (P < .001). In addition, body cell mass, fat free mass, and fat mass were lower in end-stage renal disease patients when compared with NHANES III subjects (9%, 3%, and 12%, respectively; P < .001).


CONCLUSIONS
End-stage renal disease patients have a lower tissue mass than the general population and remain in a state of overhydration while on chronic maintenance dialysis therapy.
Dumler
Francis
F
Division of Nephrology, William Beaumont Hospital, Royal Oak, MI 48073-6705, USA.
Kilates
Cristina
C
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D044383:Black People; D001823:Body Composition; D001834:Body Water; D003430:Cross-Sectional Studies; D017097:Electric Impedance; D005260:Female; D006801:Humans; D007676:Kidney Failure, Chronic / Q000503:physiopathology* / Q000628:therapy; D008297:Male; D008875:Middle Aged; D009749:Nutrition Surveys; D006435:Renal Dialysis; D044465:White People