The methodology applied to the Prisoner survey was similar to that adopted for the Prison Officer survey, whereby the survey questions were separated into those questions that focused on 'safety' issues (such as 'do you feel safe in your cell?') and those questions which dealt with non-safety issues (such as 'how easy is it to see a doctor?'). Again, after aggregating the red indicators applied to the mean scores for each question, an overall red indicator was applied to those prisons which appeared in the worst performing quartile.