Nicole Harlaar, Philip S Dale, Robert Plomin
From learning to read to reading to learn: substantial and stable genetic influence
Child development
study aimed identify sociodemographic factors associated high estimated sodiumpotassium ratio total 15105 participants assessed 35 74 years age cohort public employees elsabrazil socioeconomic data collected questionnaire 12hour nighttime urine samples collected estimate sodium potassium intake sodiumpotassium ratio calculated mmoll divided tertiles 1st tertile corresponding low 2nd tertile medium 3rd tertile high sodiumpotassium ratio proportions means compared according classification tertiles sodiumpotassium ratio using chisquare test analysis variance anova crude adjusted multinomial logistic regression models tested 1st tertile reference factors associated sodiumpotassium ratio male sex 178 95ci 160198 age 35 44 years 171 95ci 133219 incomplete elementary schooling 238 95ci 178318 lower income 147 95ci 126173 men younger individuals less schooling income showed higher mean sodiumpotassium ratio