<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Alexandrou, A</style></author><author><style face="normal" font="default" size="100%">Tsoka, E.</style></author><author><style face="normal" font="default" size="100%">Armeni, E.</style></author><author><style face="normal" font="default" size="100%">Rizos, D.</style></author><author><style face="normal" font="default" size="100%">Diamantis, T</style></author><author><style face="normal" font="default" size="100%">Augoulea, A.</style></author><author><style face="normal" font="default" size="100%">Panoulis, C.</style></author><author><style face="normal" font="default" size="100%">Liakakos, T.</style></author><author><style face="normal" font="default" size="100%">Lambrinoudaki, I.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Determinants of secondary hyperparathyroidism in bariatric patients after roux-en-y gastric bypass or sleeve gastrectomy: A pilot study</style></title><secondary-title><style face="normal" font="default" size="100%">International Journal of Endocrinology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2015</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2015///</style></date></pub-dates></dates><volume><style face="normal" font="default" size="100%">2015</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">© 2015 Andreas Alexandrou et al. Objective. Nutritional deficiencies are common after bariatric surgery. We aimed to assess the prevalence and possible predictors of secondary hyperparathyroidism (SHPT) in bariatric patients. Methods. A total of 95 patients who had undergone Roux-en-Y gastric bypass (RYGB) or sleeve gastrectomy (SG) were assessed after a median of 3 years after surgery. Anthropometric/demographic and weight-loss parameters were compared according to the presence of SHPT, independently for men/premenopausal women and postmenopausal women. Results. SHPT was highly prevalent (men/premenopausal women, 52.1%; postmenopausal women, 31.9%). Among men/premenopausal women, multivariate analysis indicated that SHPT was predicted by (a) 25-hydroxyvitamin D levels (Exp(B) = 0.869, P-value = 0.037), independently of age, sex, smoking; (b) calcium (Exp(B) = 0.159, P-value = 0.033) and smoking, independently of age and sex; (c) magnesium (Exp(B) = 0.026, P-value = 0.046) and smoking, independently of age and sex. Among postmenopausal women, SHPT was predicted by menopausal age independently of age, smoking, and levels of 25-hydroxyvitamin D or calcium. The development of SHPT was not associated with the type of surgery. Conclusions. RYGB and SG exhibited similar effects regarding the regulation of the hypothalamus-pituitary-parathyroid axis after surgery. Vitamin D status and menopausal age appear to determine SHPT on the long term. SHPT should be sought and vigorously treated with calcium and vitamin D supplementation.</style></abstract></record></records></xml>