CF Research News (CFRN) is the lay-facing sister journal of Journal of Cystic Fibrosis (JCF) and publishes Lay Summaries (LS) that explain the findings of scientific papers published in JCF, predominantly to people with cystic fibrosis (PwCF). To date, there have been no studies which have examined the readability of lay summaries (LS) and scientific abstracts, published in CFRN and JCF, respectively. Readability is an objective measure of the reading skills an individual must possess to aid in the understanding of the material being read [ [1] Badarudeen S Sabharwal S. Assessing readability of patient education materials: current role in orthopaedics. Clin Orthop Relat Res. 2010; 468: 2572-2580 Crossref PubMed Scopus (276) Google Scholar , [2] O'Sullivan L Sukumar P Crowley R McAuliffe E Doran P. Readability and understandability of clinical research patient information leaflets and consent forms in Ireland and the UK: a retrospective quantitative analysis. BMJ Open. 2020; 10e037994 Crossref PubMed Scopus (17) Google Scholar ]. Given that CFRN is a lay person's/PwCF-facing publication, we anticipated that the readability of its Lay Summaries would be better when compared to paired scientific abstracts published JCF. It was therefore the aim of this investigation to 1) compare the readability of lay summaries published in CFRN with paired scientific abstracts published in JCF and 2) provide recommendations for authors preparing to write lay summaries for CFRN.