- Design
- Nationwide retrospective propensity-matched cohort
- Population
- Taiwanese adults with COPD, type 2 diabetes, or both
- Primary outcome
- Osteoporosis and major osteoporotic fractures
- Effect
- COPD vs T2DM osteoporosis aHR 1.51 (1.35–1.69); both vs T2DM MOF aHR 1.19
A propensity-matched cohort from Taiwan's national insurance database, in Chest (21 September), compared bone outcomes in patients with COPD, type 2 diabetes, or both.
Compared with diabetes alone, COPD was associated with a higher risk of osteoporosis (aHR 1.51, 95% CI 1.35–1.69). Having both conditions carried a higher risk of osteoporosis (1.39), major osteoporotic fracture (1.19) and spine fracture (1.35) than diabetes alone, but no more than COPD alone. The association between COPD and osteoporosis was stronger in men.
Osteoporosis screening is well embedded for women after menopause and increasingly for people with diabetes, but men with COPD are often missed. Oral steroid courses, inactivity, low body weight and smoking all contribute.
- Assess fracture risk (for example with FRAX) in patients with COPD, including men
- Count lifetime oral steroid courses and consider bone protection with repeated courses
- Check vitamin D and encourage weight-bearing activity through rehabilitation
- Remember vertebral fractures reduce lung function further
Why it matters
Bone health is an overlooked comorbidity in COPD, and men carry more of the risk than expected.
Don't overread it
This is an observational database study; osteoporosis was identified from diagnosis codes.
The statistics, in plain English
A hazard ratio of 1.51 means about half as much again the risk of osteoporosis compared with diabetes. Coding-based diagnoses of osteoporosis depend on who was tested, which may bias comparisons between groups.
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