Fig. 5

Between-group mean differences within analysis pairs from trials that used a 0–100 scale and a 5-point scale to measure pain intensity. Gordon 2010b, Gordon 2010a, and Cloutier 2013 use crossover designs; all other trials use parallel group designs. Study weight refers to the contribution of a scale within each analysis of study, comparison, and timepoint; 50% for each scale would suggest no difference in the precision of the scales. Scales contributing more than 50% within an analysis pair have narrower confidence intervals (more precision). CI, confidence interval; N, number of participants; SD, standard deviation; VAS, visual analogue scale