title: Comparative validity and repeatability of a single question, a twenty-eight-item FFQ and estimated food records to assess takeaway meal intake.
abstract: A single question (SQ) and a twenty-eight-item FFQ to measure takeaway meal intake were compared with two 7-d estimated food records (EFR; reference method). Test methods were completed after the reference period and repeated 6-8 d later for repeatability. The SQ asked about intake of high-SFA takeaway meals. FFQ items included low- and high-SFA meals. Test methods were compared with EFR for sensitivity, specificity, and positive and negative predictive values, using a goal of ≤1 high-SFA weekly takeaway meals. Bland-Altman analyses were used to check agreement between measurement approaches, the κ coefficient was used to summarise the observed level of agreement, and Spearman's correlation was used to assess the degree to which instruments ranked individuals. Young adults were recruited from two universities, and 109 participants (61 % female) completed the study. The mean age was 24·4 (sd 4·9) years, and the mean BMI was 23·5 (sd 3·7) kg/m2. The SQ and the FFQ had a sensitivity of 97 and 83 % and a specificity of 46 and 92 %, respectively. Both methods exhibited moderate correlation for measuring total and high-SFA takeaway meal intakes (r s ranging from 0·64 to 0·80). Neither instrument could measure precise, absolute intake at the group or individual level. Test methods ranged from fair (κ w =0·24) to moderate agreement (κ w =0·59). The repeatability for all was acceptable. The FFQ identified excessive high-SFA takeaway meal intake and measured individuals' category for total and high-SFA takeaway intakes. Both methods are suitable for ranking individuals for total or high-SFA takeaway meal intakes.
authors: 1School of Science and Health,Western Sydney University,Richmond, Sydney, NSW 2753,Australia.
authors: Amelia S
authors: AS
authors: Cook
authors: 2Western Sydney Local Health District,NSW Health,Liverpool, Sydney, NSW 1871,Australia.
authors: Rochelle
authors: R
authors: McCook
authors: 3Department of Statistics,Macquarie University,North Ryde, Sydney, NSW 2113,Australia.
authors: Peter
authors: P
authors: Petocz
authors: 4Discipline of Nutrition and Dietetics,School of Life and Environmental Sciences,The Charles Perkins Centre,The University of Sydney,Camperdown, Sydney, NSW 2050,Australia.
authors: Fiona
authors: F
authors: O'Leary
authors: 4Discipline of Nutrition and Dietetics,School of Life and Environmental Sciences,The Charles Perkins Centre,The University of Sydney,Camperdown, Sydney, NSW 2050,Australia.
authors: Margaret
authors: M
authors: Allman-Farinelli
mesh_terms: D000293:Adolescent; D000328:Adult; D015992:Body Mass Index; D015930:Diet Records; D059305:Diet, High-Fat / Q000009:adverse effects*; D002149:Energy Intake; D057140:Fast Foods / Q000009:adverse effects*; D005247:Feeding Behavior; D005260:Female; D006801:Humans; D008297:Male; D062407:Meals; D009517:New South Wales / Q000453:epidemiology; D009765:Obesity / Q000453:epidemiology / Q000209:etiology; D050177:Overweight / Q000453:epidemiology / Q000209:etiology; D010465:Perception; D064787:Portion Size; D015995:Prevalence; D015203:Reproducibility of Results; D012147:Restaurants; D057566:Self Report; D011795:Surveys and Questionnaires; D055815:Young Adult
keywords:  EFR estimated food records;  SQ single question; FFQ; Fast food; Nutrition assessment; Takeaway meals; Validation studies