{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,16]],"date-time":"2026-10-16T12:10:24Z","timestamp":1792152624431,"version":"4.4.0"},"reference-count":36,"publisher":"FapUNIFESP (SciELO)","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Arq Bras Endocrinol Metab"],"published-print":{"date-parts":[[2010,3]]},"abstract":"<jats:p>OBJECTIVE: To evaluate bone metabolism, bone density (BMD) and vertebral fractures in morbidly obese individuals. SUBJECTS AND METHODS: Case series of 29 premenopausal obese patients, 15 of whom had been submitted to bariatric surgery. Serum calcium, albumin, PTH and 25-hydroxy vitamin D (25OHD) were measured as well as bone densitometry of the lumbar spine and proximal femur, and lateral spine x-rays. RESULTS: High parathyroid hormone (PTH) levels were recorded in 46.6% of the surgical patients and in 21.4% of the non-surgical patients (p = 0.245); 26.7% of the former and 28.6% of the latter revealed levels 25OHD &lt; 30 ng\/mL (p = 1.000). Calcium intake was higher in the surgical group (p = 0.004) along with lower serum calcium concentrations (p = 0.019). There were no significant differences in bone mineral density (BMD) or in the prevalence of vertebral fractures between groups. CONCLUSION: In premenopausal women undergoing Roux-en-Y gastric bypass there is important intestinal calcium mal absorption which seems to be the main factor causing secondary hyperparathyroidism.<\/jats:p>","DOI":"10.1590\/s0004-27302010000200021","type":"journal-article","created":{"date-parts":[[2010,5,13]],"date-time":"2010-05-13T09:03:50Z","timestamp":1273741430000},"page":"233-238","source":"Crossref","is-referenced-by-count":16,"title":["Factors associated with secondary hyperparathyroidism in premenopausal women undergoing Roux-en-Y gastric bypass for the treatment of obesity"],"prefix":"10.1590","volume":"54","author":[{"given":"Renata Sim\u00f5es de","family":"Vasconcelos","sequence":"first","affiliation":[{"name":"Universidade do Estado de Pernambuco, Brasil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ma\u00edra","family":"Vi\u00e9gas","sequence":"additional","affiliation":[{"name":"Universidade do Estado de Pernambuco, Brasil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Thyciara Fontenele","family":"Marques","sequence":"additional","affiliation":[{"name":"Universidade do Estado de Pernambuco, Brasil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Erik Trov\u00e3o","family":"Diniz","sequence":"additional","affiliation":[{"name":"Universidade do Estado de Pernambuco, Brasil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cynthia Salgado","family":"Lucena","sequence":"additional","affiliation":[{"name":"Universidade do Estado de Pernambuco, Brasil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jos\u00e9 Bezerra","family":"C\u00e2mara Neto","sequence":"additional","affiliation":[{"name":"UPE, Brasil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Francisco","family":"Bandeira","sequence":"additional","affiliation":[{"name":"Universidade do Estado de Pernambuco, 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