Kaori Ishii, Ai Shibata, Minoru Adachi, Yoshiyuki Mano, Koichiro Oka
School grade and sex differences in domain-specific sedentary behaviors among Japanese elementary school children: a cross-sectional study
BMC public health
investigate whether oral health literacy ohl impacts missing data obtained selfreporting oral health epidemiological research crosssectional study conducted parents n 344 4 5yearold children randomly selected public schools within city curitiba brazil parental ohl measured using brazilian version rapid estimate adult literacy dentistry breald30 parents answered set questionnaires comprising 88 items concerning sociodemographic economic data childrens access dental services oral hygiene behaviour diet mealtime behaviour total number unanswered items tui number unanswered items type question openended dichotomous multiple choice 4 options 59 options participant compared across different levels ohl chisquared mannwhitney kruskalwallis spearmans correlation test multiple poisson regression used estimate rate ratios rr tui ohl scores respective 95 confidence interval 95 ci approximately onethird studied parents 37 exhibited low ohl breald30 21 prevalence missing data least one item 855 low ohl associated failing respond openended items p 0003 multiplechoice items 4 p 0003 5 9 options p 0030 negative correlation ohl scores tui r 0195 p 0001 well number unanswered items types questions p 001 except dichotomous questions parents lower ohl likely show higher values tui rr 095 093098 adjusted income education participants lower ohl significantly likely fail complete research questionnaires impact ohl missing data greater complex types items