COPD and Osteoporosis: Epidemiology, Pathophysiology, Clinical Impact, and Management Strategies: A Narrative Review.

BACKGROUND: Chronic obstructive pulmonary disease (COPD) and osteoporosis are highly prevalent chronic conditions that frequently co-occur, yet their comorbid relationship remains systematically underrecognized in clinical practice. Approximately 38% of COPD patients have confirmed osteoporosis, yet fewer than 20% receive bone-protective pharmacotherapy. OBJECTIVE: To synthesize current evidence on the epidemiology, shared pathophysiological mechanisms, clinical consequences, and integrated management strategies for COPD-associated osteoporosis. METHODS: A narrative review was conducted through systematic searching of PubMed and MEDLINE (through December 2024) using the terms 'COPD,' 'osteoporosis,' 'bone mineral density,' 'fracture risk,' and 'corticosteroids.' Peer-reviewed original research, systematic reviews, meta-analyses, and clinical guidelines were included. Non-peer-reviewed sources were excluded. RESULTS: Shared mechanisms underlying COPD-associated osteoporosis include chronic systemic inflammation (elevated IL-6, TNF-α), corticosteroid-induced bone loss, sarcopenia, vitamin D deficiency, and overlapping risk factors including smoking, advanced age, and low BMI. Osteoporotic fractures, particularly vertebral and hip, independently increase all-cause mortality, worsen pulmonary mechanics, accelerate functional decline, and generate direct healthcare costs exceeding $17 billion annually in the United States (a general US osteoporotic-fracture cost estimate, not specific to COPD). Despite this burden, screening rates are low and treatment is substantially underutilized. CONCLUSIONS: Osteoporosis in COPD represents a modifiable comorbidity with major and measurable clinical impact. Proactive DXA-based screening, individualized pharmacotherapy with bisphosphonates or denosumab, pulmonary rehabilitation, and multidisciplinary coordinated care are evidence-supported strategies that remain underimplemented. Updating COPD clinical guidelines to mandate systematic bone health assessment is an urgent priority.