Chloe Moore, Pamela Gallagher, Simon Dunne
Health literacy, eHealth literacy and their association with burden, distress, and self-efficacy among cancer caregivers
Frontiers in psychology
cognitive functioning older age profoundly impacts quality life health research cognition older age focused mean levels intraindividual variability iiv around may risk factors outcomes independent mean value investigating risk factors associated iiv typically involved deriving summary statistic person residual error around fitted mean however ignores uncertainty estimates prohibits exploring associations timevarying factors biased floorceiling effects address propose mixedeffects location scale betabinomial model estimating average probability iiv word recall test english longitudinal study ageing adjusting mean performance analysis 9873 individuals across 7 mean 34 waves 20022015 found iiv greater older ages lower education females difficulties activities daily living later birth cohorts interviewers recorded issues potentially affecting test performance study introduces novel method identifying groups greater iiv bounded discrete outcomes findings implications daily functioning care work needed identify impact future health outcomes