@article{3157754, title = "Comparative effects of teriparatide and risedronate in glucocorticoid-induced osteoporosis in men: 18-month results of the EuroGIOPs trial", author = "Glueer, Claus-C and Marin, Fernando and Ringe, Johann D. and Hawkins, and Federico and Moericke, Ruediger and Papaioannu, Nikolaos and Farahmand, and Parvis and Minisola, Salvatore and Martinez, Guillermo and Nolla, Joan and M. and Niedhart, Christopher and Guanabens, Nuria and Nuti, Ranuccio and and Martin-Mola, Emilio and Thomasius, Friederike and Kapetanos, Georgios and and Pena, Jaime and Graeff, Christian and Petto, Helmut and Sanz, and Beatriz and Reisinger, Andreas and Zysset, Philippe K.", journal = "JOURNAL OF BONE AND MINERAL RESEARCH", year = "2013", volume = "28", number = "6", pages = "1355-1368", publisher = "Wiley", issn = "0884-0431", doi = "10.1002/jbmr.1870", keywords = "BONE MINERAL DENSITY; BONE MICROSTRUCTURE; FINITE ELEMENT ANALYSIS; GLUCOCORTICOID-INDUCED OSTEOPOROSIS; HIGH RESOLUTION QUANTITATIVE COMPUTED TOMOGRAPHY; MALE OSTEOPOROSIS; VERTEBRAL FRACTURE", abstract = "Data on treatment of glucocorticoid-induced osteoporosis (GIO) in men are scarce. We performed a randomized, open-label trial in men who have taken glucocorticoids (GC) for 3 months, and had an areal bone mineral density (aBMD) T-score 1.5 standard deviations. Subjects received 20g/d teriparatide (n=45) or 35mg/week risedronate (n=47) for 18 months. Primary objective was to compare lumbar spine (L1L3) BMD measured by quantitative computed tomography (QCT). Secondary outcomes included BMD and microstructure measured by high-resolution QCT (HRQCT) at the 12th thoracic vertebra, biomechanical effects for axial compression, anterior bending, and axial torsion evaluated by finite element (FE) analysis from HRQCT data, aBMD by dual X-ray absorptiometry, biochemical markers, and safety. Computed tomography scans were performed at 0, 6, and 18 months. A mixed model repeated measures analysis was performed to compare changes from baseline between groups. Mean age was 56.3 years. Median GC dose and duration were 8.8mg/d and 6.4 years, respectively; 39.1% of subjects had a prevalent fracture, and 32.6% received prior bisphosphonate treatment. At 18 months, trabecular BMD had significantly increased for both treatments, with significantly greater increases with teriparatide (16.3% versus 3.8%; p=0.004). HRQCT trabecular and cortical variables significantly increased for both treatments with significantly larger improvements for teriparatide for integral and trabecular BMD and bone surface to volume ratio (BS/BV) as a microstructural measure. Vertebral strength increases at 18 months were significant in both groups (teriparatide: 26.0% to 34.0%; risedronate: 4.2% to 6.7%), with significantly higher increases in the teriparatide group for all loading modes (0.005