Weight Change and Body Composition in Patients With Parkinson's Disease

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Abstract

Objective To compare reports of weight loss and actual measures of body composition to predict nutritional risk in patients with Parkinson's disease and matched control subjects.

Design Patients and control subjects were asked to record prior changes in weight and activity. Body composition was then compared in both groups using percentage ideal body weight (IBW), body mass index (BMI), triceps skinfold (TSF) thickness, midarm muscle circumference, and percentage body fat (BF) as determined by bioelectrical impedance.

Subjects Fifty-one free-living patients with Parkinson's disease and 49 matched control subjects were recruited from the neurology clinic and the surrounding area.

Main outcome measures We anticipated that reported weight loss would be greater and actual measures of body composition would show greater nutritional risk in the patients with Parkinson's disease.

Statistical analyses performed χ2 Analysis was used to determine differences in the ratio of patients and control subjects who lost weight. Paired t tests were used to compare amount of weight change and measures of body composition. Correlations were performed among measures of weight change, body composition, and associated disease factors.

Results Patients with Parkinson's disease were four times more likely to report weight loss greater than 10 lb than the matched control subjects (odds ratio>4.2). Patients reported a mean (±standard deviation) weight loss of 7.2±2.9 lb and control subjects reported a mean weight gain of 2.1±1.6 lb (P<.01). Percentage IBW (P<.02), BMI (P<.009), TSF thickness (P<.005), and percentage BF (P<.022) were lower in patients. Significant correlations (P<.01) were found between reported weight change and percentage IBW, BMI, TSF, percentage BF, and stage of the disease.

Conclusions/application Patients with Parkinson's disease appear to be at greater nutritional risk than a matched population. Simple screening and assessment tools can be used to detect nutritional risk. J Am Diet Assoc. 1995; 95:979-983.

Section snippets

Subjects and Methods

The study was approved by the University of Kansas Medical Center human subjects committee. The 51 patients studied were diagnosed and followed up in the Parkinson's disease clinic. Forty-nine control subjects matched for age, sex, and race formed the comparison group. Both patients and control subjects were free-living. Thirty-eight patients were in stage II, 12 were in stage III, and only 1 was in stage IV of the disease according to the scale of Hoehn and Yahr (9). Duration of the disease,

Weight Change

Significantly more patients reported weight loss than matched control subjects, and the mean amount weight loss reported was significantly greater for the patients (Table 1, Table 2). Some patients lost weight initially and gained the same or more weight later. Thirty-one patients (61%) reported at least a 5-lb weight loss sometime since the diagnosis of the disease. During the same period, eight control subjects (20%) lost at least 5 lb.

Anthropometric and Body Composition Measures

Patients weighed less than control subjects, but

Weight Change

Accuracy of self-reported weight and historical weight change is always suspect, but these measures may have more merit than commonly perceived. Stunkard and Albaum (15), for example, studied 550 men and women at seven geographic sites and found that people reported their body weights with surprising accuracy. The participants in our study appeared to be reasonably aware of their weight, especially if weight changed. The patients’ perceptions were supported by good correlations with objective

Applications

The patients with Parkinson's disease in this study represent an elderly population who, because of their age, would normally be considered at increased risk for malnutrition and other health problems. The addition of Parkinson's disease appears to substantially increase the risk. For our population, weight change, percentage IBW, and/or BMI were effective screening measures.

Weight loss might be prevented by routinely monitoring indicators of nutritional risk and providing appropriate

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