MARQUES DA SILVA, Mariane; CAMPOS SALA, Priscilla; MATOS DE MIRANDA TORRINHAS, Raquel Suzana    LINETZKY WAITZBERG, Dan. Efficiency of the 24-hour food recall instrument for assessing nutrient intake before and after Roux-en-Y gastric bypass. []. , 30, 6, pp.1240-1247. ISSN 1699-5198.  https://dx.doi.org/10.3305/nh.2014.30.6.7828.

Background: Nutritional and food intake assessments before and after bariatric surgery may be important to correct eating habits and nutritional deficiencies. Aim: To assess the efficiency of the 24-hour food recall (24hR) form as a fast method for assessing nutrient intake before and after a Roux-en-Y gastric bypass (RYGB). Methods: This study analyzed data from 10 obese patients with type 2 diabetes mellitus (T2DM). Food intake (calories, macronutrients, and micronutrients) before and 3 months after RYGB were assessed with the 24hR as well as the seven-day food record (7dR) as the gold standard reference. Virtual Nutri Plus^® software was used to quantify nutrients. Results: The 7dR data revealed deficits in the estimated intake of total fiber and 14 out of 22 micronutrients pre- and postoperatively, combined; the 24hR failed to detect intake deficits in only two of these micronutrients (vitamins A and B3). Other postoperative deficits included carbohydrates, vitamin B1, copper, and iron, on which the 24hR was sensitive to only the iron deficit. In our pre- versus post-operative comparison analyses, the 7dR revealed decreases in total calories, carbohydrates, total and all subclasses of fat and fiber, and 12 micronutrients; in the analogous comparison analyses, the 24hR failed to detect decreases in the ingestion of monounsaturated and saturated fats and in six of these micronutrients. Conclusions: In obese T2DM patients, the 24hR performed reasonably well for probing nutrient intake before and after RYGB, but is not recommended for tracking changes over time, including pre- versus postoperative deficits.

: 24-hour food recall; 7-day food record; Virtual Nutri Plus^®; Roux-en-Y gastric bypass.

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