Figure 4

Change in the number of depression-related symptoms in the fibromyalgia group. Repeated-measures analysis of variance showed a significant effect of time course in the depression-related symptoms (F = 6.68, P = 0.001). The Bonferroni post-hoc multiple comparisons test revealed significant differences in the number of depression-related symptoms between 1 month before the disaster and 1 month after the disaster (P = 0.006)**, between 1 month before the disaster and 13 months after the disaster (P <0.0001)***, and between 1 month before the disaster and 19 months after the disaster (P = 0.010)*.