[Association of insulin resistance to different anthropometric measures and cardiovascular risk factors in a non-diabetic population]. / Relación de la resistencia a la insulina con diferentes medidas antropométricas y factores de riesgo cardiovascular en una población no diabética.

BACKGROUND AND OBJECTIVE: Insulin resistance (IR) has been directly related to obesity, particularly central obesity, and to other cardiovascular risk factors (CVRFs). Direct IR quantification is difficult in clinical practice, and indirect methods such as HOMA (homeostasis model assessment) have therefore been developed. The aim of this study was to assess the association of IR, as measured by HOMA, with different anthropometric measures and some CVRFs. MATERIALS AND METHODS: A cross-sectional, observational study was carried out in a general population sample older than 18 years in the province of Albacete, Spain. Sample size was 678 subjects. Participants completed a survey and underwent physical examinations and laboratory tests. Obesity measures included body mass index, waist perimeter, and sagittal abdominal diameter. Data analysis was performed using SPSS 15.0 software. RESULTS: Mean values of obesity measures were higher in males as compared to females and increased with age. IR prevalence was 39.8%. All assessed anthropometric measures, decreased HDL (high density lipoprotein) cholesterol and increased non-HDL cholesterol were independently associated to the risk of IR. CONCLUSIONS: A clear association exists between different anthropometrical measures and IR in the general population. There is also an association between lipid profile cahnges and the risk of experiencing IR.

Índice tobillo-brazo e incidencia de la mortalidad por todas las causas y morbilidad cardiovascular en una cohorte prospectiva de origen poblacional / Ankle-brachial index and the incidence of all-cause mortality and cardiovascular morbidity in a prospective cohort study of a general population

Introducción El objetivo del estudio ha sido valorar la capacidad predictiva del índice tobillo-brazo (ITB) en la mortalidad por todas las causas y en el criterio compuesto de valoración morbilidad de causa cardiovascular (CV) y mortalidad total en una muestra de origen poblacional. Métodos Estudio de cohortes prospectivo en el que han participado 1.143 individuos seguidos durante 10,8 años (DE=2,2) libres de eventos CV. El ITB se estratificó en 2 niveles: menos de 0,9 y entre 0,9 y 1,4. Las variables predictoras incluidas en el ajuste fueron: sexo, edad (corte en 50 años), hipertensión arterial, diabetes mellitus, obesidad, hipercolesterolemia (corte en 200mg/dl), cociente cHDL/triglicéridos, fumador e hiperfibrinogenemia. Se calcularon curvas de supervivencia (Kaplan-Meier) y se aplicó un modelo de regresión de Cox.ResultadosLa edad media de los participantes (56,8% mujeres) fue de 47,1 años (DE=17,4), rango 18-91 años. Un 6,9% de la muestra presentó un ITB menor de 0,9. Tras el ajuste, un ITB menor de 0,9 presentó para la mortalidad por todas las causas una hazard ratio (HR) de 1,90, intervalo de confianza (IC) del 95%: 1,10-3,26, y para el combinado morbilidad CV y mortalidad por todas las causas una HR de 1,69 (IC del 95%: 1,07-2,67). Conclusiones Un ITB<0,9 ha demostrado ser un factor de riesgo independiente de mortalidad por todas las causas y del combinado morbilidad CV y mortalidad global tras un seguimiento de 10,8 años en la muestra procedente de nuestra población (AU)

Introduction: The aim of this study was to investigate the predictive value of the ankle-brachialindex (ABI) in all-cause mortality and composite end-point all-cause mortality and cardiovascularmorbidity in a sample of a general population. Methods: We performed a prospective cohort study of 1143 individuals free of cardiovascularevents followed up for 10.8 years (SD = 2.2). The ABI was stratified in two levels: less than 0.9and between 0.9 and 1.4. The predictive variables included in the adjustment were sex, age(cut-off: 50 years), hypertension, diabetes, obesity, hypercholesterolemia (cut-off: 200 mg/dl),high-density lipoprotein-cholesterol (HDLc)/triglyceride ratio, smoking and hyperfibrinogenemia. Kaplan-Meier survival curves and multivariate Cox proportional hazards analysis wereused. Results: The mean age of the participants (56.8% female) was 47.1 years (SD = 17.4), range 18-91years. An ABI value < 0.9 was found in 6.9% of the sample. After adjustment, an ABI of < 0.9 hada hazard ratio (HR) of 1.90 [95% confidence interval (CI) 1.10-3.26] for all-cause mortality, andan HR of 1.69 (95% CI 1.07-2.67) for composite all-cause mortality and cardiovascular morbidity.Conclusions: In our population, an ABI < 0.9 was a risk factor independent of all-cause mortalityand of composite all-cause mortality and cardiovascular morbidity after a follow-up of 10.8years (AU)