Age-standardized disability-adjusted life year rates for<unk>  per 100,000 inhabitants in 2004.<unk>  typically begins during early adulthood; roughly half of all people who have<unk>  develop the condition between the ages of 17 and 24, especially those subjected to traumatic experiences. However, some studies suggest that the majority of young people affected for the first time are between the ages of 25 and 30. Women are twice as likely as men to develop<unk>  and it occurs far more frequently in people of above average intelligence.<unk>  can continue for months or years, depending on how and when treatment is sought. If left untreated, it may worsen to the point where one's life is seriously affected by<unk>  attacks and by attempts to avoid or conceal the condition. In fact, many people have had problems with personal relationships, education and employment while struggling to cope with<unk> . Some people with<unk>  may conceal their condition because of the stigma of mental illness. In some individuals, symptoms may occur frequently for a period of months or years, then many years may pass with little or no symptoms. In some cases, the symptoms persist at the same level indefinitely. There is also some evidence that many individuals (especially those who develop symptoms at an early age) may experience a complete cessation of symptoms later in life (e.g., over age 50). In 2000, the World Health Organization found prevalence and incidence rates for<unk>  to be very similar across the globe. Age-standardized prevalence per 100,000 ranged from 309 in Africa to 330 in East Asia for men and from 613 in Africa to 649 in North America, Oceania, and Europe for women.
Panic disorder
Hyperthyroidism
Depression 
Cardiovascular disease
Late life depression
Hypochondriasis
Blood phobia
Anxiety disorder