Bland-Altman plots. Difference between the total scores on the first and second (A) International Physical Activity Questionnaire (IPAQ) and (B) Short QUestionnaire to Assess Health-enhancing physical activity (SQUASH) plotted against the mean of both assessments, together with 95% limits of agreement (LOA). CI, confidence interval.
Arends et al. Arthritis Research & Therapy 2013 15:R99 doi:10.1186/ar4279