title: Test-retest reliability of a new questionnaire on the diet and eating behavior of one year old children.
abstract: BACKGROUND
  As part of a sub-study in the ongoing Norwegian RCT 'Fit for Delivery', a new questionnaire, using a combination of food frequency, scale, and categorical questions to gather data on the diets and eating patterns of one year olds, was developed and tested for reliability by test-retest.
  
  
  RESULTS
  Of 102 parents recruited to the study, 94 completed both test and retest. Correlation coefficients (Spearman's r, and/or Cohen's kappa, where applicable) were high for all categories of question, with a mean value of 0.72 for Spearman's r for food frequency variables, and a mean value of 0.75 for Cohen's kappa for non-numeric variables such as breast feeding status, showing very high test-retest reliability.
  
  
  CONCLUSIONS
  This newly developed diet and eating habit questionnaire had strong test-retest reliability in a test population similar to the study population, for which it was developed. This indicates that the questionnaire is reliable in this population.
authors.affiliation: Department of Public Health, Sports and Nutrition, University of Agder, Serviceboks 422, 4604, Kristiansand, Norway. Rachel.k.myr@gmail.com.
authors.forename: Rachel Kristin
authors.initials: RK
authors.lastname: Myr
authors.affiliation: Department of Public Health, Sports and Nutrition, University of Agder, Serviceboks 422, 4604, Kristiansand, Norway. elling.bere@uia.no.
authors.forename: Elling
authors.initials: E
authors.lastname: Bere
authors.affiliation: Department of Public Health, Sports and Nutrition, University of Agder, Serviceboks 422, 4604, Kristiansand, Norway. nina.c.overby@uia.no.
authors.forename: Nina Cecilie
authors.initials: NC
authors.lastname: Øverby
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D001903:Bottle Feeding / Q000523:psychology / Q000706:statistics & numerical data*; D001942:Breast Feeding / Q000523:psychology / Q000706:statistics & numerical data*; D004032:Diet; D005247:Feeding Behavior / Q000502:physiology / Q000523:psychology*; D005260:Female; D005518:Food Preferences / Q000502:physiology / Q000523:psychology*; D015438:Health Behavior; D006801:Humans; D007223:Infant; D008297:Male; D010290:Parents; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires