Figure 3.

Change in the subscale scores of the Impact of Event Scale – Revised. (A) Intrusion: repeated-measures analysis of covariance (ANCOVA) revealed significant main effects of time course (F(3,315) = 3.11, P = 0.027) and group (F(2,105) = 10.1, 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) = 0.17, P = 0.99). (B) Avoidance: repeated-measures ANCOVA revealed significant main effects of time course (F(3,315) = 4.60, P = 0.004) and group (F(2,105) = 10.3, P <0.0001) on change in the IES-R score. However, there was no significant interaction between time course and group on change in the IES-R score (F(6,315) = 0.28, P = 0.95). (C) Hyperarousal: repeated-measures ANCOVA revealed main effects of time course as trend level (F(3,315) = 2.39, P = 0.069) and significant main effects of group (F(2,105) = 19.2, P <0.0001) on change in the IES-R score. However, there was no significant interaction between time course and group on change in the IES-R score (F(6,315) = 0.65, P = 0.69).

Usui et al. Arthritis Research & Therapy 2013 15:R130   doi:10.1186/ar4310
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