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O objetivo deste estudo foi avaliar a freqüência de osteoporose de acordo com os sítios ósseos avaliados, utilizando um estudo transversal de base clínica. Foram avaliados 610 exames densitométricos em relação a freqüência de osteoporose/osteopenia e concordância do diagnóstico de acordo com o local avaliado. Apesar de alta correlação da DMO entre os sítios ósseos, a freqüência de osteoporose variou de acordo com o sítio avaliado. Osteoporose esteve presente em 14 e 18% dos pacientes, quando considerado o colo do fêmur e fêmur total, e 42 e 30% quando considerados o triângulo do Ward e coluna (p< 0,05). Um quarto das mulheres consideradas em risco aumentado de fratura pelo exame da coluna lombar foi classificado como normal pelo estudo do colo do fêmur; 16% com risco aumentado pelo estudo do colo do fêmur foi classificado como normal no estudo da coluna. Este estudo demonstra que existe discordância nos resultados densitométricos de acordo com a área estudada, afetando a ocorrência de osteoporose. Para julgamento clínico de risco de fratura, a avaliação combinada de dois sítios ósseos é o procedimento mais adequado. In this study a cross-sectional survey was conducted to evaluate the frequency of osteoporosis according to the site used. Six hundred and ten densitometric exams were analyzed regarding the frequency of osteoporosis/osteopenia according to the bone site. Besides the high correlation of bone density among the different sites analyzed, the frequency of osteoporosis has significantly changed with respect to the bone site examined. Osteoporosis was present in 14% and 18% of the patients when neck or total femur were used for diagnosis, whereas these numbers were 42% and 30% for Ward's triangle and lumbar spine sites, respectively. About 25% of the patients who were considered at risk for bone fracture using the lumbar spine evaluation were considered at no risk when the femoral neck was used as reference; on the other hand, 16% considered at increased risk using the femur were considered at no risk at lumbar spine. In conclusion, the frequency of osteoporosis changes according to the site used. For fracture risk assessment, the use of at least two different bone sites would be the best approach

Avaliação do diagnóstico densitométrico de osteoporose/osteopenia conforme o sítio ósseo