Red-listing is a practice that is extremely widespread across PCTs in Britain and does not look to be one that will diminish in influence any time soon.
Fieldwork for this study ran from Wednesday 20 April to Tuesday 3 May 2011. The sample comprised 120 PCT personnel comprising 49 Senior Managers, 71 GP Commissioners and 23 Pharmacists. The methodology used was a quantitative online survey with respondents invited to participate by e-mail.
The sample was screened in two ways: Firstly, for those who are involved in formulary and recommended products lists in the PCT. Secondly, only respondents from PCTs who use the traffic light system or red listed products were able to enter. 73% of those who tried to enter this survey met both criteria and were included as respondents.
A large geographical coverage was achieved by the sample with 87 different PCTs represented by respondents. Among those providing multiple participants were Birmingham East and North, Norfolk and Salford.