2016
DOI: 10.1186/s12911-016-0362-8
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Comprehension of confidence intervals - development and piloting of patient information materials for people with multiple sclerosis: qualitative study and pilot randomised controlled trial

Abstract: BackgroundPresentation of confidence intervals alongside information about treatment effects can support informed treatment choices in people with multiple sclerosis.We aimed to develop and pilot-test different written patient information materials explaining confidence intervals in people with relapsing-remitting multiple sclerosis. Further, a questionnaire on comprehension of confidence intervals was developed and piloted.MethodsWe developed different patient information versions aiming to explain confidence… Show more

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Cited by 9 publications
(6 citation statements)
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“…The authors recommend for a two-armed pilot RCT a total sample size of 55, which would minimise the overall sample size for the main RCT for small to medium standardised effect sizes [52][53][54]. Additionally, pilot RCTs on decision support tools in MS showed comparable sample sizes [31,55].…”
Section: Sample Sizementioning
confidence: 99%
“…The authors recommend for a two-armed pilot RCT a total sample size of 55, which would minimise the overall sample size for the main RCT for small to medium standardised effect sizes [52][53][54]. Additionally, pilot RCTs on decision support tools in MS showed comparable sample sizes [31,55].…”
Section: Sample Sizementioning
confidence: 99%
“…Five studies were on health literacy. [60][61][62][63][64] In an RCT, Kasper et al 60 evaluated newly developed bar graphs for persons with MS risk communication showing that they were understood as well as standard pictographs. Reen et al 61 showed improved understanding in persons with MS when treatment effects were communicated in absolute terms compared with relative terms and numbers needed to treat/harm.…”
Section: Health Literacymentioning
confidence: 99%
“…Adding baseline information on clinical trials significantly improved understanding. Rahn et al 63 developed and pilot tested different types of information materials exemplifying confidence intervals to persons with RRMS. Patient information materials were considered acceptable.…”
Section: Health Literacymentioning
confidence: 99%
“…(54)(55)(56) Additionally, pilot RCTs on decision support tools in MS showed comparable sample sizes. (32,57) Recruitment Participants will be recruited by 2-3 neurological practices, clinics or rehabilitation centres in Germany.…”
Section: Sample Sizementioning
confidence: 99%