Analysis of Correlational Validity Between OGTT Results and a Carbohydrate Intolerance Questionnaire
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abstract
Diagnosing insulin resistance via an OGTT can be costly and impractical. However, this information can be useful in recommending proper diet for individuals interested in losing weight. This study examined the association between responses to a 36 question carbohydrate intolerance questionnaire (CIQ) and responses to an OGTT in 108 women (31.613 yr, 34.77% body fat, 25.34 kg/m2). Participants submitted to DEXA body composition, health marker determination, and underwent a serial sampled (0, 30, 60, 90, and 120 minutes) 75 g OGTT. We examined the relationship between CIQ questions and the 2hr OGTT sampling (G120) and glucose AUC (GAUC). Results revealed significant correlations (p<0.05) between G120 (11225 mg/dl) and perceptions of being >25 lbs overweight (r=0.25), waist:hip ratio (r=0.28), and BIA body fat (r=0.22). Results also revealed significant correlations (p<0.05) with GAUC (26446 mg/hr/dL) to being overweight throughout life (r=0.19), being overweight since youth (r=0.27), gaining weight after age 30 (r=0.20), eating 3 meals/d (r=0.19), and waist:hip ratio (r=0.33). These findings indicate that OGTT G120 and GAUC results correlate with simple CI questions and basic body comp/health measures that may help practitioners make more informed recommendations about appropriate diet interventions.
