LAUSR

Type of funding sources: Public grant(s) – National budget only. Main funding source(s): Medical Research Council BICeP Study Group Prompt, effective bystander cardiopulmonary resuscitation (CPR) is the single most important factor determining survival from out of hospital cardiac arrest (OHCA), increasing survival up to 4-fold. However only 35%-45% of people trained in CPR actually attempt it when required. This study uses psychological theory and behaviour change techniques (BCTs) to increase the proportion of bystanders who attempt CPR in a real emergency. Intervention development study Intervention content was informed by two recent systematic reviews, which identified barriers to bystander CPR and BCTs within existing training programmes (PROSPERO CRD42018117438; CRD42019126745) and a qualitative study exploring participants’ views (n = 12) of draft text messages. A lay bystander user-involvement panel (n = 7) and an expert advisory group (comprising representatives from CPR training organisations) worked with the research team to co-produce the final intervention and agree the schedule for text message delivery.  BCT content was assessed by two independent experts. A framework analysis of interviews was undertaken.  Recognising and addressing fears, and helping people to better prepare for real-life situations were identified to be important to participants. Short, simple texts from a credible source and with a positive tone were strongly preferred, there was a strong aversion to anything "guilt-inducing". Pictures and personalisation were important, rewards less so. Regarding frequency: participants varied but around 1/week was considered adequate by most. A total of n = 35 text-messages with verified BCT content were co-developed with participants. A text message intervention incorporating BCTs, which is acceptable to intended users and CPR trained individuals has been produced and will be subject to future evaluation.