Measuring communicative health literacy – a revision of the HLS19-COM-P scale

Abstract Background Communicative health literacy (COM-HL) is important for patients being able to actively participate in communication with health care professionals, such as physicians. The HLS19-COM-P scale was developed for measuring COM-HL in the M-POHL HLS19 survey. However, two items under-discriminated according to the Rasch model and the item set did not sufficiently capture the aspect of appraising health information. Consolidating both a long and short version into a single scale was deemed appropriate. Hence, this study aimed to develop a revised version of the COM-HL scale. Methods The revision and development of new items followed a Delphi process. Items that worked well psychometrically in the six-item version of the HLS19-COM-P were kept, and new items concerning appraising information were developed. The revised version of the scale has so far been translated into nine languages (BG, CZ, DE, FR, HU, IT, NO, SK, UA). Challenging translation terms underwent multiple discussions to ensure language consistency. The interpretability of items has been explored in cognitive interviews in six countries (AT, CZ, HU, IT, SK, and UA) so far. Items that were difficult to understand were revised and tested in new interviews. The evaluation of the scale’s psychometric properties is scheduled for May and June 2024. Results The revised scale consists of eight items - two items for each of the cognitive domains of accessing, understanding, appraising, and applying health information. One item in each of these domains focuses on the interactive aspect of communication. An instruction for translation of terms that were challenging to translate has been developed. Overall, the revised HLS19-COM-P was well accepted in the cognitive interviews. Results from the quantitative testing will be presented. Conclusions The adapted HLS24-COM-P scale developed for the M-POHL Health Literacy Survey 2024-2026, is a short and conceptually sound instrument for measuring COM-HL.