Fig. 3

PRECIS-2 wheels of (A) the highest-scoring, (B) the lowest-scoring, and (C) the median trial. The concentric circles represent the different possible scores that can be awarded to each domain of the PRECIS-2 tool, with the innermost one being equivalent to 1 and the outermost one corresponding with 5. The area of the polygons enclosed by the green lines connecting the ‘score dots’ is proportional to the degree of pragmatism exhibited by the studies in question. Note that for (B), the ‘recruitment’ and ‘flexibility (adherence)’ domains could not be graded, and the matching dots are therefore missing