RESUMEN
UNLABELLED: Background. Food frequency questionnaires are used to assess dietary intake in epidemiological studies. Objective. The aim of the study was to assess the relative validity and reproducibility of a quantitative food frequency questionnaire (QFFQ) for adolescents with type 1 diabetes. METHODS: Validity was evaluated by comparing the data generated by QFFQs to those of 24-hour recalls (24 hrs). QFFQs were applied twice per patient to assess reproducibility. Statistical analysis included performing t-tests, obtaining Pearson correlation coefficients when necessary, correcting measurements for randomness by the weighted kappa method, calculating intraclass correlation coefficients, and generating Bland-Altman plots (P < 0,05). Results. The total energy and nutrient intake as estimated by the QFFQs were significantly higher than those from 24 hrs. Pearson correlation coefficients for energy-adjusted, deattenuated data ranged from 0.32 (protein) to 0.75 (lipid, unsaturated fat and calcium). Weighted kappa values ranged from 0.15 (vitamin C) to 0.45 (calcium). Bland-Altman plots indicated acceptable validity. As for reproducibility, intraclass correlation coefficients ranged from 0.24 (calcium) to 0.65 (lipid), and the Bland-Altman plots showed good agreement between the two questionnaires. CONCLUSION: The QFFQ presented an acceptable ability to classify correctly and with good reproducibility, adolescents with type 1 diabetes according to their levels of dietary intake.
RESUMEN
The scope of this work was to evaluate the risk factors for chronic non-communicable diseases (CNCDs) in subjects treated in the Nutrition Education Program of the School of Physical Education of the Federal University of Goiás. The number of individuals evaluated was 79, namely 65 adults and 14 adolescents. Socio-economic data, lifestyle and previous diseases were recorded by using anamnesis, the feeding habits (FH) were assessed by a food frequency questionnaire and the anthropometric indexes used were body mass index (BMI) and waist circumference (WC). The prevalence of overweight and obesity in the population was 42.9% (n = 27) and the average WC of adults was 82.67 ± 12.49, and 45.1% had increased or very increased risk of cardiovascular diseases. About 88.6% of the population reported the existence of CNCDs in the family. Most of the people (75%) exercised regularly. Those who smoked also drank alcohol frequently, and those that did not smoke were the ones that exercised more. The intake of fruit and vegetables is practiced by 36.7% and 63.3% of participants at least once a day, respectively. The conclusion reached is that the population studied had a high prevalence of exposure to at least one risk factor for CNCDs.