Methods
MAY
The core study consisted of a parallel two group RCT with 1:1 individual participant allocation to either the OHSCAP intervention plus treatment as usual (TAU) (intervention group) or TAU alone (control group). TAU included the standard, non-age-specific health assessment carried out at prison entry.Ethics approval for the study was granted by the Research Ethics Committee for Wales in May 2013 (reference number 13/WA/0108). National Offender Management Service research approval was provided in July 2013 (reference number 2013-115).Semi-structured interviews were held with staff delivering the intervention. A purposive sampling approach was adopted ensuring prison and healthcare staff were included. Prisoners from all of the 10 sites were also interviewed. The sample was purposive with the intention of including prisoners across a range of ages and varying health and social care needs.The interview guide format followed the OHSCAP process itself (identifying older adults, health, social and wellbeing issues, care planning and reviews) to ensure that all relevant issues were covered. Prisoners were interviewed between one and four times (mode = 2). They were interviewed as soon as possible after they entered the prison, then immediately after they had received the initial OHSCAP and, if they remained in prison, we went back to interview them after 2 to 3 months. All interviews with staff were audio recorded and lasted for approximately 1 h. It was not possible to audio record interviews with 6 of the 14 prisoners as a result of security restrictions. In these instances, 2 researchers attended the interviews and notes were taken contemporaneously.All interviews were analysed thematically using a framework method.