Amanda Biete, Vivian S S Gonçalves, Sandra P Crispim, Sylvia C C Franceschini, Ariene S Carmo, Nathalia Pizato
Ultra-Processed Foods and Schooling Are Independently Associated with Lower Iron and Folate Consumption by Pregnant Women Followed in Primary Health Care
International journal of environmental research and public health
purpose study expand school physical activity nutrition questionnaire include greater variety vegetables evaluate relative validity reliability revised items study utilized 2 convenience samples third fifth graders analysis validity n 70 reliability n 76 validity assessed comparing questionnaire items vegetable intake reported 24hour dietary recall covering reference period reliability estimates assessed via sameday testretest agreement correlations ranged 035 071 kappa statistics varied 016 066 percentage agreements ranged 57 87 testretest spearman coefficients greater 050 6 items weighted kappa values greater 040 7 items percentage agreement exceeded 75 5 items results suggest questionnaire valid reliable measure previous days vegetable intake third fifthgrade students trial registered clinicaltrialsgov nct02668744