[Impaired fasting glucose detection in blood donors population]. / Detección de glucosa en ayuno alterada en donadores de sangre.

OBJECTIVE: to identify subjects with impaired fasting glucose (IFG), from a group of apparently healthy individuals. METHODS: a cross-sectional study was undertaken in 1188 blood donors, with no family history of diabetes (T2D). All these individuals were subjected to a questionnaire, and biochemical tests. RESULTS: the prevalence of IFG was 15.9 %, 17.1 % in men and 12.9 % in women. The average blood glucose levels in subjects with IFG were 107.2 + or - 6.5 mg/dL in men and 106.0 + or - 6.1 mg/dL in women. Sixty percent of individuals with IFG showed insulin resistance. The diagnosis of metabolic syndrome (MS) in IFG subjects was 20.2 %, according to the NCEP/ATP III criteria, 21.4 % according to the International Diabetes Federation criteria; and 29.3 % according to the American Heart Association and the National Heart, Lung and Blood Institute criteria. Seventy percent of the subjects with IFG showed hypertriglyceridemia, 51 % showed hypercholesterolemia and 85 % were over-weight or obese. CONCLUSIONS: the prevalence of IFG was higher than expected, comparing with other populations reported in the literature. These apparently healthy subjects were not previously diagnosed and therefore have not received preventive actions to arrest the risk of T2D.

[Dyslipidemia prevalence and its relationship with insulin resistance in a population of apparently healthy subjects]. / Prevalencia de dislipidemias en una población de sujetos en apariencia sanos y su relación con la resistencia a la insulina.

OBJECTIVE: Evaluate dyslipidemia prevalence and its association with insulin resistance in a cohort of apparently healthy subjects. MATERIAL AND METHODS: A cross-sectional study was conducted with 1,179 donors ages 35 to 65 years. The sample population was comprised of 71% men, with an average age of 44 +/- 7. Clinical records, anthropometric data, lipid profile, fasting glycaemia, and insulin levels were obtained. RESULTS: Prevalence of hypertriglyceridemia was 57.3%, C-HDL under normal limits was 52.4%, and hypercholesterolemia was 48.7%. In addition, 36.8% of the obese individuals (as measured by waist perimeter) had hypertriglyceridemia/hypoalphalipoproteinemia, 35.2% had mixed dyslipidemia, and 33.4% had hypertriglyceridemia. Patterns of dyslipidemia were higher in subjects diagnosed with insulin resistance. CONCLUSIONS: Insulin resistance associated with hypertriglyceridemia and hypoalphalipoproteinemia was common among our studied population. However, a significant proportion of cases of apparent healthy individuals continue to go undiagnosed.

Prevalencia de dislipidemias en una población de sujetos en apariencia sanos y su relación con la resistencia a la insulina / Dyslipidemia prevalence and its relationship with insulin resistance on a population of apparently healthy subjects

OBJETIVO: Conocer la prevalencia de las dislipidemias en una población de sujetos en apariencia sanos y su relación con la resistencia a la insulina (RI). MATERIAL Y MÉTODOS: Este es un estudio transversal que incluyó a 1 179 individuos, donadores voluntarios de 35 a 65 años. Se obtuvo el historial clínico y se realizaron examen físico, determinación del perfil de lípidos, glucemia y niveles de insulina en ayuno. RESULTADOS: La edad promedio fue de 44 ± 7 años; 836 (71 por ciento) correspondían al género masculino. La prevalencia de hipertrigliceridemia fue de 57.3 por ciento, hipoalfalipoproteinemia de 52.4 por ciento e hipercolesterolemia de 48.7 por ciento. De los sujetos con obesidad (perímetro de cintura aumentado), 36.8 por ciento tenía hipertrigliceridemia/hipoalfalipoproteinemia, 35.2 por ciento dislipidemia mixta y 33.4 por ciento hipertrigliceridemia. La prevalencia de los patrones de dislipidemias fue mayor en sujetos con RI. CONCLUSIONES: La hipertrigliceridemia e hipoalfalipoproteinemia, vinculadas con RI, son comunes en la población mexicana; empero, una considerable proporción de casos carece de diagnóstico.

OBJECTIVE: Evaluate dyslipidemia prevalence and its association with insulin resistance in a cohort of apparently healthy subjects. MATERIAL AND METHODS: A cross-sectional study was conducted with 1 179 donors ages 35 to 65 years. The sample population was comprised of 71 percent men, with an average age of 44 ± 7. Clinical records, anthropometric data, lipid profile, fasting glycaemia, and insulin levels were obtained. RESULTS: Prevalence of hypertriglyceridemia was 57.3 percent, C-HDL under normal limits was 52.4 percent, and hypercholesterolemia was 48.7 percent. In addition, 36.8 percent of the obese individuals (as measured by waist perimeter) had hypertriglyceridemia/hypoalphalipoproteinemia, 35.2 percent had mixed dyslipidemia, and 33.4 percent had hypertriglyceridemia. Patterns of dyslipidemia were higher in subjects diagnosed with insulin resistance. CONCLUSIONS: Insulin resistance associated with hypertriglyceridemia and hypoalphalipoproteinemia was common among our studied population. However, a significant proportion of cases of apparent healthy individuals continue to go undiagnosed.

[Prevalence of hepatitis C virus in the blood bank at Centro Médico Nacional La Raza]. / Prevalencia del virus de hepatitis C en el Banco de Sangre del Centro Médico Nacional La Raza.

INTRODUCTION: There are no records on the prevalence of infection by HCV in Mexican population. The central area of Mexico is a highly dense demographic zone and is the influence area of the second blood bank in Latin America in terms of affluence. MATERIAL AND METHODS: We prospectively studied the prevalence and genotypes of HCV infection in 5105 individuals attending the Central Blood Bank of Centro Médico Nacional La Raza regardless if they were accepted or rejected as donors. We applied a quimiolumiscence assay as a screening test. A recombinant immunoassay (RIBA) and a qualitative polymerase chain reaction (PCR) were performed as confirmatory tests and to detect viremia, respectively. Virus genotype was identified by means of a Line Immuno Probe Assay in PCR positive samples. RESULTS: The overall prevalence of HCV infection was 0.195% (10/5105). Viremia was detected in 90% of the subjects. The prevalence of accepted donors (0.087%) was significantly lower (p = 0.017) than that of the rejected ones (0.421%). Among viremic subjects, 60 % were infected with genotype 2 and 40% with a subtype combination (a/b) of genotype 1. DISCUSSION: The prevalence of HCV infection in our population was significantly lower than the world mean prevalence estimated in 3 %. A higher prevalence of genotype 2 in asymptomatic individuals contrasts with previous studies with a selected population where genotype 1 prevailed.