Change in the score of the Impact of Event Scale – Revised. Repeated-measures analysis of covariance revealed significant main effects of time course (F(3,315) = 3.32, P = 0.030) and group (F(2,105) = 11.5, P <0.0001) on change in the Impact of Event Scale – Revised (IES-R) score. However, there was no significant interaction between time course and group on change in the IES-R score (F(6,315) = 0.20, P = 0.96).
Usui et al. Arthritis Research & Therapy 2013 15:R130 doi:10.1186/ar4310