Factors associated with bone mineral density in women who underwent bariatric surgery/Fatores associados a densidade mineral ossea em mulheres submetidas a cirurgia bariatrica

To analyze factors associated with bone mineral density (BMD) of candidates and patients admitted to Bariatric Surgery (BS). This study included 61 women who had done or were waiting for BS. Anthropometric variables, body composition and BMD from the femur, femoral neck, lumbar spine and the whole body were measured. The factors associated with changes in BMD, such as smoking, alcohol ingestion, sedentary lifestyle, BS, nutritional supplementation and age were evaluated. The statistical significance was set at 5%. Age and BS were associated with changes in BMD. Among the individuals who had BS done, the rates of osteopenia/osteoporosis were greater in the femur (OR 3.34; CI [1.52-1.83]) and femoral neck (OR 3.69; CI [1.34-2.08]). Subjects older than 50 years also had greater rates of BMD in the lumbar spine (OR 4.12; CI [2.09-22.33]), the whole body (OR 4.77; CI [1.34-28.14]), femur (OR 16.94; CI [2.16-124.32]) and femoral neck (OR 14.95; CI [1.86-110.66]). Patients who have had BS and are over 50 years of age showed higher rates of osteopenia/osteoporosis, which demonstrate the necessity of further studies exploring the effects of BS and its impact on bone metabolism. Keywords: bone density, obesity, bariatric surgery, osteoporosis. Analisar fatores associados a densidade mineral ossea (DMO) de candidatas e de pacientes submetidas a cirurgia bariatrica (CB). Neste estudo transversal foram avaliadas variaveis antropometricas, composicao corporal e DMO do femur, colo do femur, coluna lombar e corpo inteiro, alem dos fatores associados as alteracoes na DMO: tabagismo, consumo de alcool, sedentarismo, CB, suplementacao e idade em 61 mulheres com media de idade de 43,97 ([+ or -] 10,73) anos. Significancia pre estabelecida em 5%. A idade e CB apresentaram associacao com alteracoes na DMO. Os sujeitos operados apresentaram maiores chances de apresentar osteopenia/osteoporose no femur (RC 3,34; IC [1,52-1,83]) e no colo do femur (RC 3,69; IC [1,34-2,08]) e os sujeitos com idade superior a 50 anos apresentaram maiores chances de apresentar alteracoes na DMO na coluna lombar (RC 4,12; IC [2,09-22,33]), no corpo inteiro (RC 4,77; IC [1,34-28,14]), femur (RC 16,94; IC [2,16-124,32]) e no colo do femur (RC 14,95; IC [1,86 110,66]). Pacientes submetidos a CB e com idade superior a 50 anos apresentam maiores alteracoes na DMO, demonstrando a importancia de mais estudos que explorem os efeitos da CB e suas repercussoes sobre o metabolismo osseo. Palavras-chave: densidad