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RESUMEN El objetivo del estudio es determinar la asociacion entre los factores de riesgo: indice de masa corporal bajo, alimentacion con bajo contenido de calcio, menarquia tardia, menopausia precoz, sedentarismo y condicion socioeconomica de pobreza en pacientes con osteoporosis posmenopausica (OP) de los Hospitales Vicente Corral y Jose Carrasco. Estudio de casos y controles, participaron 112 mujeres posmenopausicas con osteoporosis con densitometria osea T-score <-2.5 DE y 112 controles, edades comprendidas entre 50 y 65 anos, por cada caso se incluyo 1 control pareado por la edad. La muestra se calculo en Epi Info 6, con una prevalencia del 10% y un nivel de confianza (IC) del 95%. La edad, indice de masa corporal (IMC), menarquia, menopausia se obtuvieron a traves del interrogatorio. La encuesta de tendencia de consumo de calcio, condicion socioeconomica y actividad fisica, se realizaron utilizando instrumentos validados. Los resultados fueron sometidos al calculo de porcentajes, odds ratio de prevalencia (OR) con un IC95% y regresion. La media de la ingesta de calcio fue de 597,77 mg por dia, el 96% consumieron menos de 1000 mg de calcio, 17,4% con condicion socioeconomica de pobreza, 79% de mujeres fueron sedentarias distribuidas en ambos grupos. Existio asociacion de osteoporosis con menopausia precoz (OR 4,55 IC95% 2,23-9,31), condicion socioeconomica de pobreza (OR 3,56 IC95% 1,64-17,73) y menarquia tardia (OR 5,17 IC95% 1,69-15,81); no hay asociacion con bajo IMC, deficiente consumo de calcio y estilo de vida sedentaria. Palabras clave: Osteoporosis posmenopausica, factores de riesgo, menarquia, menopausia, sedentarismo, ingesta de calcio. ABSTRACT The purpose of the study presented herein is the assessment of the statistical relation between postmenopausal osteoporosis (PO) and the following risk factors: low body mass index (BMI), low calcium diet, delayed menarche, early menopause, sedentary lifestyle and socioeconomic status. The research involved the screening of 112 postmenopausal women with osteoporosis and 112 control patients, aged 50 to 65, patients belonging respectively to the Hospitals Vicente Corral and Jose Carrasco, in Cuenca, Ecuador. A questionnaire addressing calcium-intake, socio-demographic, reproductive and lifestyle-related risk factors was employed previously to bone mineral density and other physical measurements using validated instruments. In addition to the calculation of the mean, standard deviation and percentage of occurrence of the dependent and independent variables, the logistic regression analysis was applied to obtain the odds ratio of prevalence (OR) with a confidence interval (CI) of 95%. Of the examined pop ulation 96% consume less than 1000 mg of calcium per day and the mean daily calcium intake varies around 597,8 mg. In both groups 17,4% of the women belong to the socioeconomic status (SES) of poverty, and 79% are sedentary. OP seems to be related with early menopause osteoporosis (OR 4,55 IC95% 2,23-9,31), socioeconomic status (OR 3,56 IC95% 1,64-17,73) and late menarche (OR 5,17 IC95% 1,69-15,81). OP does not seems to be associated with low BMI, low calcium-intake and sedentary lifestyle. Keywords: Postmenopausal osteoporosis, risk factors, menarche, menopause, sedentary, calcium intake.

Factores de riesgo asociados a la osteoporosis posmenopáusica: Estudio de casos de los Hospitales Vicente Corral y José Carrasco