A 1998 study linked panic disorders and joint hypermobility. The prevalence of joint hypermobility syndrome among patients with a panic disorder was 67.7% compared to the control psychiatric group (10.1%). Women and younger subjects were found to be over 20 times more likely to have hypermobile joints than their counterparts in the control group. The study also found a higher prevalence for mitral valve prolapse (8%). Depression and anxiety were other correlated symptoms.[3]
A 2003 study found that 78% of people with hypermobility also had orthostatic intolerance, which can lead to chronically high adrenalin and chronic anxiety.[4]