Sampling and recruitment
Three NZ LTC organizations involved in the RCT were purposively sampled, seeking variation across business structure: one publicly listed (‘for-profit’) company, one private company (‘for-profit’) and one charitable organization (charity). Grouping facilities by organization enabled exploration of whether organizational influence impacted SUp being embedded in facilities. The sample were staff from the three organizations. Once organization consent was gained, researchers sampled for maximum diversity in participants by job role: senior management, onsite management and clinical staff. Eligible staff were emailed an invitation to participate by researchers. All participants gave written informed consent. All methods were carried out in accordance with relevant guidelines and regulations.