• osteoporosis;
  • Parkinson's disease;
  • bone densitometry


There are few studies of osteoporosis in Parkinson's disease (PD). We assessed the prevalence of osteoporosis in a PD clinic cohort. All subjects with a confirmed diagnosis of PD attending a clinic were invited to participate. All consenting subjects had bone density measured by dual energy X-ray absorptiometry scanning. Further data, including demography, disease duration, and disease severity, were collected. One hundred five subjects participated; median age was 75 (54–92) years. Fifty-one (49%) patients were men. Of the men: median T score, −1.3 (range, −4.7 to 3.8); median Z score, 0.0 (−3.2 to 4.7); diagnostic categories: osteoporosis, 20%; osteopenia, 41%; normal, 39%. Of the women: median T score −2.7 (−4.7 to 1.4); median Z score, −0.25 (−2.6 to 4.2); diagnostic categories: osteoporosis, 63%; osteopenia, 28%; and normal, 9%. Whole sample: osteoporosis, 42%; osteopenia, 34%; and normal, 24%. There were associations between age, depression, disease duration, and osteoporosis but not with disease severity. Female gender was an independent predictor of osteoporosis. The prevalence of osteoporosis/osteopenia is considerable in PD patients but does not exceed that of other people of similar age. Osteoporosis/osteopenia was present in almost all women of this age group with PD. © 2005 Movement Disorder Society