Journal
COPD-JOURNAL OF CHRONIC OBSTRUCTIVE PULMONARY DISEASE
Volume 5, Issue 5, Pages 291-297Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15412550802363329
Keywords
Bone Mineral Density; COPD; Osteoporosis; Osteopenia
Categories
Funding
- Pennsylvania Dept of Health [RFA 02-07-20]
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Osteoporosis is a non-pulmonary manifestation whose true prevalence is uncertain in severe chronic obstructive pulmonary disease (COPD). We describe the prevalence and risk factors for osteoporosis in a large, well characterized (COPD) cohort. Dual energy x-ray absorptiometry of the lumbar spine and hip, full pulmonary function testing, cardiopulmonary exercise test, 6 minute walk distance and demographics were performed in 179 non-selected COPD patients. Patients were 59 7 years old, smoked 53 32 pack years, FEV1 26% +/- 9.8, and 45% were currently taking prednisone. Bone mineral density measurements were abnormal in 97%; 66% had dual energy X-ray absorptiometry defined osteoporosis, while 31% had osteopenia. The prevalence of osteoporosis in males versus females was 70% versus 62% (p = 0.33); both groups had similar fracture rates. The prevalence of osteoporosis in African Americans versus Caucasians was 69% versus 65% (p = 0.78). Caucasians had a significantly lower Ward's Triangle T score than African Americans (-2.52 +/- -0.96 vs. -2.16 +/- -0.91, p = 0.04). Those with bone fractures took higher doses of prednisone than those without fractures. Univariate analysis identified BMI and FVC% as predictors for osteoporosis (p = 0.03 OR 0.934 p = 0.006 OR 0.974). Multivariate analysis revealed only FVC% as a significant predictor (p = 0.006, OR 0.974). Osteoporosis is highly prevalent in severe COPD, and affects males and African Americans to a similar degree as females and Whites. Osteoporosis should be considered in severe (COPD) regardless of race or gender.
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