{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T22:47:58Z","timestamp":1792018078509,"version":"4.4.0"},"reference-count":20,"publisher":"Oxford University Press (OUP)","issue":"5","license":[{"start":{"date-parts":[[2010,11,18]],"date-time":"2010-11-18T00:00:00Z","timestamp":1290038400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2011,5,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>The objective of this study was to determine the effect of once-yearly zoledronic acid on the number of days of back pain and the number of days of disability (ie, limited activity and bed rest) owing to back pain or fracture in postmenopausal women with osteoporosis. This was a multicenter, randomized, double-blind, placebo-controlled trial in 240 clinical centers in 27 countries. Participants included 7736 postmenopausal women with osteoporosis. Patients were randomized to receive either a single 15-minute intravenous infusion of zoledronic acid (5\u2009mg) or placebo at baseline, 12 months, and 24 months. The main outcome measures were self-reported number of days with back pain and the number of days of limited activity and bed rest owing to back pain or a fracture, and this was assessed every 3 months over a 3-year period. Our results show that although the incidence of back pain was high in both randomized groups, women randomized to zoledronic acid experienced, on average, 18 fewer days of back pain compared with placebo over the course of the trial (p\u2009=\u2009.0092). The back pain among women randomized to zoledronic acid versus placebo resulted in 11 fewer days of limited activity (p\u2009=\u2009.0017). In Cox proportional-hazards models, women randomized to zoledronic acid were about 6% less likely to experience 7 or more days of back pain [relative risk (RR)\u2009=\u20090.94, 95% confidence interval (CI) 0.90\u20130.99] or limited activity owing to back pain (RR\u2009=\u20090.94, 95% CI 0.87\u20131.00). Women randomized to zoledronic acid were significantly less likely to experience 7 or more bed-rest days owing to a fracture (RR\u2009=\u20090.58, 95% CI 0.47\u20130.72) and 7 or more limited-activity days owing to a fracture (RR\u2009=\u20090.67, 95% CI 0.58\u20130.78). Reductions in back pain with zoledronic acid were independent of incident fracture. Our conclusion is that in women with postmenopausal osteoporosis, a once-yearly infusion with zoledronic acid over a 3-year period significantly reduced the number of days that patients reported back pain, limited activity owing to back pain, and limited activity and bed rest owing to a fracture. \u00a9 2011 American Society for Bone and Mineral Research.<\/jats:p>","DOI":"10.1002\/jbmr.292","type":"journal-article","created":{"date-parts":[[2010,11,18]],"date-time":"2010-11-18T18:18:08Z","timestamp":1290104288000},"page":"984-992","source":"Crossref","is-referenced-by-count":28,"title":["Once-yearly zoledronic acid and days of disability, bed rest, and back pain: Randomized, controlled HORIZON Pivotal Fracture Trial"],"prefix":"10.1093","volume":"26","author":[{"given":"Jane A","family":"Cauley","sequence":"first","affiliation":[{"name":"Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dennis","family":"Black","sequence":"additional","affiliation":[{"name":"Division of Clinical Trials and Multicenter Studies, University of California San Francisco, San Francisco, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steven","family":"Boonen","sequence":"additional","affiliation":[{"name":"Division of Gerontology and Geriatrics, Leuven University, Leuven, Belgium"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Steven R","family":"Cummings","sequence":"additional","affiliation":[{"name":"California Pacific Medical Center, San Francisco, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peter","family":"Mesenbrink","sequence":"additional","affiliation":[{"name":"Novartis Pharmaceuticals Corporation, East Hanover, NJ, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lisa","family":"Palermo","sequence":"additional","affiliation":[{"name":"Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zulema","family":"Man","sequence":"additional","affiliation":[{"name":"Centro M\u00e9dico TIEMPO, Buenos Aires, Argentina"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peyman","family":"Hadji","sequence":"additional","affiliation":[{"name":"Department of Endocrinology, Reproductive Medicine, and Osteoporosis, Philipps-University of Marburg, Germany"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ian R","family":"Reid","sequence":"additional","affiliation":[{"name":"Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"name":"on behalf of the HORIZON 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