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  • Title: ARB users exhibit a lower fracture incidence than ACE inhibitor users among older hypertensive men.
    Author: Kwok T, Leung J, Barrett-Connor E, Osteoporotic Fractures in Men (MrOS) Research Group.
    Journal: Age Ageing; 2017 Jan 10; 46(1):57-64. PubMed ID: 28181652.
    Abstract:
    INTRODUCTION: Angiotensin II, a major effector protein of the renin angiotensin system (RAS), induces bone loss under certain conditions. Drugs that block the RAS may therefore reduce bone loss and fracture incidence. The fracture incidence in older hypertensive men with long-term use of angiotensin-converting enzyme (ACE) inhibitors or angiotensin receptor blockers (ARBs) were compared with the incidence in users of calcium channel blockers (CCBs) and non-users. METHODS: A total of 5,994 US men aged 65 years or older who had bone mineral density measured at baseline in the Osteoporotic Fractures in Men Study (MrOS) were followed for fracture incidence for an average of 6.8 years. Men with follow-up dual-energy X-ray absorptiometry bone mineral density data and who reported hypertension at any visit, or use of antihypertensive medications at any visit among those with non-missing mediation data were included in the study (N = 2,573). RESULTS: Six hundred and nineteen men had taken ACE inhibitors, while 182 took ARBs for at least 4 years. Using Cox regression for the incidence of non-vertebral fractures, we found that long-term users of ACE inhibitors and ARBs each had a significantly lower fracture incidence than non-users. The hazard ratio of non-vertebral fractures was three times lower in ARB users than ACE inhibitor users (Hazard ratio (95% confidence interval): 0.194 (0.079–0.474) versus 0.620 (0.453–0.850), P = 0.0168). There was a trend of greater fracture risk reduction with longer duration of ARB use, but not for ACE inhibitor use. CONCLUSIONS: In older hypertensive men, ARBs use was associated with lower incidence of non-vertebral fracture than ACE inhibitors or CCBs.
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