Figure 1. Prevalence of GAD in T2DM patients, in the GP, and GAD prevalence ratios. Temporal trend in GAD prevalence from 2000 to 2010. The prevalence of GAD was calculated by dividing the number of GAD cases by the total number of T2DM patients or GP. The rates increased from 0.81 to 1.03% in T2DM and from 0.25 to 0.63% in the GP. The prevalence of GAD in T2DM patients was significantly higher overall than in the GP from 2000 to 2010 (p < 0.0001). Moreover, each year from 2000 to 2010 the prevalence ratios of GAD were significantly higher in T2DM patients than the GP (p < 0.0001). The T2DM-to-GP GAD prevalence ratio decreased from 3.25 in 2000 to 1.63 in 2010. GAD = generalized anxiety disorder; GP = general population; T2DM = type 2 diabetes mellitus.
