@article {Durnez1712, author = {Anne Durnez and Simon Paternotte and Jacques Fechtenbaum and Robert B.M. Landew{\'e} and Maxime Dougados and Christian Roux and Karine Briot}, title = {Increase in Bone Density in Patients with Spondyloarthritis During Anti-Tumor Necrosis Factor Therapy: 6-year Followup Study}, volume = {40}, number = {10}, pages = {1712--1718}, year = {2013}, doi = {10.3899/jrheum.121417}, publisher = {The Journal of Rheumatology}, abstract = {Objective. To assess the effects on bone mineral density (BMD) of prolonged anti-tumor necrosis factor (anti-TNF) therapy in patients with spondyloarthritis (SpA); to compare the BMD changes to those observed in SpA patients not treated with anti-TNF; and to identify the predictors of these changes. Methods. Fifty-nine patients with SpA according to the European Spondylarthropathy Study Group criteria who were treated with anti-TNF therapy for at least 4 years were included. Thirty-four patients with SpA from an international longitudinal observational study (OASIS cohort) were used as a control group. Lumbar spine and hip BMD were measured by dual-energy x-ray absorptiometry at baseline, after 1 year, and after at least 4 years. Results. Over an average 6.5 years{\textquoteright} followup, the increase in BMD was 11.8\% ({\textpm} 12.8\%) at the lumbar spine (p \< 0.0001) and 3.6\% ({\textpm} 9.3\%) at the great trochanter (p = 0.0001) in patients treated with anti-TNF. At the lumbar spine, the increase was similar in patients with and those without syndesmophytes. BMD changes were significantly higher in the anti-TNF group than in the control group at lumbar spine (p \< 0.0001), at femoral neck (p = 0.002), and at trochanter (p = 0.011), but not at total hip (p = 0.062). Multivariate analysis showed that the predictors of lumbar spine BMD changes in the total population were the use of anti-TNF (p \< 0.0001) and, in the anti-TNF therapy group, the 1-year lumbar spine BMD change (p = 0.007). Conclusion. This study shows that prolonged anti-TNF therapy increases lumbar spine and trochanter BMD. This effect should be taken into account before introducing antiosteoporotic treatment in these patients.}, issn = {0315-162X}, URL = {https://www.jrheum.org/content/40/10/1712}, eprint = {https://www.jrheum.org/content/40/10/1712.full.pdf}, journal = {The Journal of Rheumatology} }