Made available in DSpace on 2015-04-14T13:53:50Z (GMT). No. of bitstreams: 1 443506.pdf: 944520 bytes, checksum: 12334ffc5e4569092c3546d748f2f8eb (MD5) Previous issue date: 2012-08-23 / Changes in bone mass in women are both determined by genetic and environmental factors. The most significant bone loss occurs around menopause. Objectives: Evaluate the prevalence of low bone mass and of the associated risk factors of in postmenopausal women. Methods: Review of medical records of postmenopausal women bone densitometry of lumbar spine and hip done at the Centro de Diagn?stico da Unimed Porto Alegre, Brasil in the period of June 2011 to November 2011, in a retrospective study. This study assessed bone mineral density, anthropometric data, clinical history and risk factors for low bone mass. The information was obtained before the time of the test. Results: 716 postmenopausal women met the criteria of the study .Most women were Caucasian 676 (97.5%), average 61.45 years old, had BMI of 26.25 kg / m?, menarche at 12.9 years old and menopause at 48.4 years old. 304 (42.6%) of the women were 55-64 years old. 293 (41%) women had average BMI. More than half of the sample 388 (54.2%) subjects had osteopenia and among the regions of interest, the lumbar spine showed 401 (56.6%) subjects with osteopenia and 154 (21.7%) with osteoporosis. 254 (46,3%) women were eutrophic and had low bone mass. Conclusion: when the sample of postmenopausal women was evaluated by bone densitometry there was a higher than expected occurrence of low bone mass and therefore associated risk factors for fractures. / Altera??es na massa ?ssea s?o relevantes e influenciadas por fatores gen?ticos e ambientais. Nas mulheres, o per?odo de maior perda ocorre ao redor da menopausa. Objetivos: Avaliar a preval?ncia de baixa massa ?ssea em mulheres p?s-menop?usicas e os fatores de risco associados. M?todos: Revis?o de prontu?rios de mulheres p?s-menop?usicas usu?rias do Centro de Diagn?stico da Unimed Porto Alegre que realizassem densitometria ?ssea de coluna lombar e f?mur proximal. Foram avaliados os valores de densidade mineral ?ssea, dados antropom?tricos, dados cl?nicos e fatores de risco para baixa massa ?ssea investigados em question?rio, de junho a novembro de 2011. Resultados: Foram inclu?das 716 mulheres p?s-menop?usicas. A maioria foi de etnia branca, com 676 (97,5%) mulheres, m?dia et?ria de 61,45 anos, IMC de 26,25 kg/m?, com menarca aos 12,9 anos e menopausa aos 48,4 anos. A faixa et?ria predominante foi de 55 a 64 anos com 304 (42,6%) mulheres. Quanto ao IMC, 293(41%), apresentaram peso adequado. A osteopenia predominou em 388 (54,2%) dos sujeitos e entre os s?tios, a coluna lombar apresentou predomin?ncia de osteopenia em 401 (56,6%) e osteoporose em 154 (21,7%) mulheres. 254(46,3%) mulheres eram eutr?ficas e com baixa massa ?ssea. Conclus?o: O estudo mostrou um n?mero acima do esperado de mulheres com baixa massa ?ssea e com fatores de risco definidos presentes no momento da avalia??o da densitometria ?ssea e, portanto mais suscet?veis ? fratura.