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Delgado C.,University of California at San Francisco | Delgado C.,San Francisco Veterans Affairs Medical Center | Ward P.,Emory University | Chertow G.M.,Stanford University | And 13 more authors.
Journal of Renal Nutrition | Year: 2014

Objective: Estimating dietary intake is challenging in patients with chronic diseases. The aim of this study was to calibrate the Block Brief 2000 food frequency questionnaire (BFFQ) using 3-day food diary records among patients on dialysis. Methods: Data from 3-day food diary records from 146 patients new to dialysis were reviewed and entered into National Cancer Institute self-administered 24-hour dietary recall (ASA24), a web-based dietary interview system. The information was then re-entered omitting foods reported in the diaries that were not in the BFFQ to generate a "BFFQ-restricted" set of intakes. We modeled each major dietary component (i.e., energy [total calories], protein, carbohydrate, fat) separately using linear regression. The main independent variables were BFFQ-restricted food diary estimates computed as the average of the 3 days of diaries, restricted to items included in the BFFQ, with the unrestricted 3-day food diary averages as dependent variables. Results: The BFFQ-restricted diary energy estimate of 1,325±545kcal was 87% of the energy intake in the full food diary (1,510.3±510.4, P < .0001). The BFFQ-restricted diary carbohydrate intake was 83% of the full food diary (156.7±78.7g vs. 190.4±72.7, P < .0001). The BFFQ-restricted fat intake was 90% of the full-diary-reported fat intake (50.1±24.1g vs. 56.4±21.6g, P < .0001). Daily protein intake assessments were not statistically different by BFFQ-restricted diary and full diary assessment (63.1±28.5 vs. 64.1±21.4g, P = .60). The associations between BFFQ-restricted diary intake and unrestricted intake were linear. Three-day diary-reported intake could be estimated from BFFQ-restricted intake with r2 ranging from 0.36 to 0.56 (P < .0001 for energy [total calories], protein, carbohydrate, and fat). Final equations did not include adjustments for age, sex, or race because the patterns of associations were not significantly different. Conclusion: Energy and macronutrient estimates by BFFQ are lower than estimates from 3-day food diaries, but simple calibration equations can be used to approximate total intake from BFFQ responses. © 2014.

Garcia-Dominic O.,Pennsylvania State University | Trevino R.P.,Social and Health Research Center | Echon R.M.,Social and Health Research Center | Mobley C.,University of Nevada, Las Vegas | And 3 more authors.
Health Promotion Practice | Year: 2012

The authors evaluated the validity and reliability of the Block Kids Food Frequency Questionnaire (BKFFQ) and the Block Kid Screener (BKScreener) in Mexican American children living along the Texas-Mexico border who participated in the National Institutes of Health-funded Proyecto Bienestar Laredo. The Bienestar/NEEMA health program is a school-based diabetes and obesity control program, and the Proyecto Bienestar Laredo is the translation of the Bienestar/NEEMA health program to 38 elementary schools in Laredo, Texas. Par ticipants included 2,376 eight-year-old boys (48%) and girls (52%) from two school districts in Laredo. Two Food Frequency Questionnaire (BKFFQ and BKScreener) dietary intakes were collected, and an expert panel of nutritionist assigned a classification response quality of "Good," "Questionable," and "Poor," based on playfulness (systematic or nonrandom) patterns and completion rates. In addition, both instruments were assessed for reliability (test-retest) in 138 students from a San Antonio School District. Children's height, weight, percentage body fat, reported family history of diabetes, and Texas Assessments of Knowledge and Skills in reading and mathematics scores were collected. This study showed that for Mexican American children living along the Texas-Mexico border, within the time constraints of the classroom, BKScreener yielded better data than the BKFFQ. © 2012 Society for Public Health Education.

Kalantar-Zadeh K.,University of California at Los Angeles | Kovesdy C.P.,Salem Veterans Affairs Medical Center | Kovesdy C.P.,University of Virginia | Bross R.,University of California at Los Angeles | And 8 more authors.
Journal of Renal Nutrition | Year: 2011

Objectives: Periodic assessment of dietary intake across a given dialysis population may help to improve the clinical outcomes related to nutrients such as dietary protein, phosphorus, or potassium. Although dietary recalls and food records are used to assess dietary intake at individual level and over shorter periods, food frequency questionnaires (FFQ) are used to rank subjects of a given population according to their nutrient intake over longer periods. Design: To modify and refine the conventional Block FFQ to develop a specific FFQ for dialysis patients. Setting: A total of 8 DaVita outpatient dialysis clinics in Los Angeles area, which participated in the " Nutrition and Inflammation in Dialysis Patients" study. Patients: The study included 154 patients undergoing maintenance hemodialysis (MHD). Main Outcome Measure: Dietary intake of participating MHD patients using a 3-day food record, supplemented by a person-to-person dietary interview, to capture food intake over the last hemodialysis treatment day of the week and the 2 subsequent nondialysis days. Results: Analyses of the food records identified the key contributors to the daily nutrient intake in the 154 participating MHD patients. A " Dialysis-FFQ" was developed to include approximately 100 food items representing the total food intake of 90% of the patients of the " Nutrition and Inflammation in Dialysis Patients" study population. Distinctions were made in several food items on the basis of key nutritional issues, such as protein, phosphorus, and potassium, in dialysis patients. Conclusions: We have developed a " Dialysis FFQ" to compare and rank dialysis patients according to their diverse nutrient intake. Although the Dialysis-FFQ may be a valuable tool to compare dialysis patients and to identify those who ingest higher or lower amounts of a given nutrient, studies are needed to examine the utility of the Dialysis-FFQ for nutritional assessment of dialysis patients. © 2011 National Kidney Foundation, Inc.

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