Combined Activity and Cognitive Intervention for ICU Survivors

This mixed-methods study comprising a 3-arm pilot RCT and a qualitative study aims to investigate the preliminary effects and feasibility of a home-based combined activity and cognitive intervention for ICU survivors (COMBAT-ICU). Adopting a 3-arm design with COMBAT-ICU, exercise and attention placebo study arms will enable us to evaluate the added effects, if any, of the novel combined intervention compared with the standard exercise-only rehabilitation strategy and attention placebo. Data triangulation from quantitative and qualitative aspects can facilitate result interpretation. The study's objectives are: 1. To evaluate the preliminary effects of the COMBAT-ICU intervention for ICU survivors on PICS, physical, mental and cognitive outcomes, HRQoL, unplanned re-hospitalisation rate, and mortality. 2. To explore the feasibility and acceptability of the COMBAT-ICU intervention and ICU survivors' intervention engagement experience. The hypothesis of the first objective is that upon completion of the COMBAT-ICU intervention, ICU survivors will have reduced PICS, improved physical function, mental health, cognition and HRQoL, and reduced unplanned readmissions and mortality compared with the exercise and attention placebo groups at post-intervention and 3 months thereafter. While the hypothesis of the second objective is that the COMBAT-ICU intervention is feasible and acceptable for ICU survivors.