title: Validation of a Dish-Based Semiquantitative Food Questionnaire in Rural Bangladesh.
abstract: A locally validated tool was needed to evaluate long-term dietary intake in rural Bangladesh. We assessed the validity of a 42-item dish-based semi-quantitative food frequency questionnaire (FFQ) using two 3-day food diaries (FDs). We selected a random subset of 47 families (190 participants) from a longitudinal arsenic biomonitoring study in Bangladesh to administer the FFQ. Two 3-day FDs were completed by the female head of the households and we used an adult male equivalent method to estimate the FD for the other participants. Food and nutrient intakes measured by FFQ and FD were compared using Pearson's and Spearman's correlation, pairedt-test, percent difference, cross-classification, weighted Kappa, and Bland-Altman analysis. Results showed good validity for total energy intake (pairedt-test,p< 0.05; percent difference <10%), with no presence of proportional bias (Bland-Altman correlation,p> 0.05). After energy-adjustment and de-attenuation for within-person variation, macronutrient intakes had excellent correlations ranging from 0.55 to 0.70. Validity for micronutrients was mixed. High intraclass correlation coefficients (ICCs) were found for most nutrients between the two seasons, except vitamin A. This dish-based FFQ provided adequate validity to assess and rank long-term dietary intake in rural Bangladesh for most food groups and nutrients, and should be useful for studying dietary-disease relationships.
authors.affiliation: Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA. pil864@mail.harvard.edu.|Research Center of Environmental Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan. pil864@mail.harvard.edu.
authors.forename: Pi-I D
authors.initials: PD
authors.lastname: Lin
authors.affiliation: Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA. sbromage@mail.harvard.edu.
authors.forename: Sabri
authors.initials: S
authors.lastname: Bromage
authors.affiliation: Department of Environmental Research, Dhaka Community Hospital, Dhaka 1217, Bangladesh. mostofa07@gmail.com.
authors.forename: Md Golam
authors.initials: MG
authors.lastname: Mostofa
authors.affiliation: Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA. jgallen@hsph.harvard.edu.
authors.forename: Joseph
authors.initials: J
authors.lastname: Allen
authors.affiliation: Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA 02215, USA. emily_oken@harvardpilgrim.org.
authors.forename: Emily
authors.initials: E
authors.lastname: Oken
authors.affiliation: Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA. molly.kile@oregonstate.edu.
authors.forename: Molly L
authors.initials: ML
authors.lastname: Kile
authors.affiliation: Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA. dchris@hsph.harvard.edu.
authors.forename: David C
authors.initials: DC
authors.lastname: Christiani
mesh_terms: D000293:Adolescent; D000328:Adult; D015992:Body Mass Index; D002648:Child; D015930:Diet Records; D002149:Energy Intake; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D018977:Micronutrients / Q000008:administration & dosage / Q000032:analysis; D008875:Middle Aged; D008962:Models, Theoretical; D015596:Nutrition Assessment; D015203:Reproducibility of Results; D012424:Rural Population; D012621:Seasons; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires; D014801:Vitamin A / Q000008:administration & dosage / Q000032:analysis; D055815:Young Adult
chemical_list: D018977:Micronutrients; D014801:Vitamin A
keywords: Bangladesh; adult male equivalent; duplicate food sample; food diary; food frequency questionnaire; validation study