Using a step-wedge design, we will conduct a Type 2 hybrid implementation trial to assess the extent to which PNEP uptake is improved over 24 months of observation using the Network for the Improvement of Addiction Treatment (NIATx) implementation strategy bundle. Nine prisons were non-randomly* allocated to one of three groups, with the groups receiving the intervention (i.e., NIATx) over 24 months at staggered time intervals (every 6 months). This will be followed by an additional 12 month post-intervention period, when sustainability will be assessed.
*Originally randomized; allocation was modified due to logistical constraints