Body composition in Parkinson's disease: a study with dual-energy X-ray absorptiometry.

Some investigators have reported that patients with Parkinson's disease (PD) tend to lose weight, and have a low body mass index. For this reason, it was suggested that PD patients have an increased metabolic rate. Using dual-energy X-ray absorptiometry (DXA) we determined, the body composition in 52 unselected PD patients (28 males, 24 females) and in 80 age and sex-matched healthy controls (40 males, 40 females). The mean+/-SD duration of PD was 5.9+/-4.8 years. PD severity was assesed with the Unified PD Rating Scale (UPDRS) and Hoehn & Yahr staging. PD patients and controls did not differ significantly in height, weight and body mass index. The total fat and percentage of fat were significantly higher (p<0.01) and the lean body mass and water content were lower (p<0.001 for each) in male PD patients when compared with male controls. All these values were similar in female PD patients and female controls. Fat mass, lean body mass and water content did not correlate with the UPDRS scores and Hoehn &Yahr staging, although PD patients with higher UPDRS scores had higher percentage of fat.