General practitioner advance care planning knowledge and attitudes: ACP-GP cluster-randomised controlled trial.

Advance care planning (ACP) supports adults understanding and sharing their values, goals, and preferences regarding future medical care. General practitioners (GPs) are key figures in conducting ACP conversations with patients. GPs' ACP knowledge and attitudes have been identified as potential barriers. This study evaluates the effects of ACP-GP, a complex ACP intervention, on GPs' knowledge and attitudes. A phase-III cluster-randomised controlled trial. 35 Belgian GPs participated. The intervention included a training for GPs, ACP conversations, a patient workbook, and a documentation template. GPs' knowledge and attitudes were assessed using an adaptation of the Next Steps questionnaire, at baseline, three, and six months postintervention. Generalised estimating equations were applied to analyse the data. Analyses showed no intervention effect on GPs' knowledge (W(2)=4.18, p=.123) and attitudes (all W(2)<3.85, all p>.146) compared with the control group. The ACP-GP intervention did not improve GPs' knowledge and attitudes. Failure to detect an effect may stem from a ceiling effect, with GPs scoring high on baseline outcomes across groups. Questionnaires may require fine-tuning to accurately map their suggested role as potential barriers. Prospectively registered at ISRCTN (ISRCTN12995230) on 19 June 2020.

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Déclaration de conflit d'intérêts

Competing interests: None declared.