“…We found a higher but not significant proportion of comorbid anxiety disorders are associated with bipolar II and bipolar NOS disorders rather than bipolar I disorder, in accordance to previous studies [Cassano et al, 1999;Doughty et al, 2004;Pini et al, 1997;Perugi et al, 1999]. Specific types of comorbid anxiety disorders that had been demonstrated to be strongly associated with bipolar disorder include PD [Cassano et al, 1999;Chen and Dilsaver, 1995a;Doughty et al, 2004;Mantere et al, 2006;Rihmer et al, 2001], PTSD [Mantere et al, 2006;Otto et al, 2004], OCD [Angst, 1998;Chen and Dilsaver, 1995b;Perugi et al, 1997Perugi et al, , 1999, and simple phobia [Mantere et al, 2006;Rihmer et al, 2001]. However, it is noteworthy that the rates of anxiety disorder comorbidity differ in these studies.…”