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The age of onset is the age at which an individual acquires, develops, or first experiences a condition or symptoms of a disease or disorder. For instance, the general age of onset for the spinal disease scoliosis is "10-15 years old," meaning that most people develop scoliosis when they are of an age between ten and fifteen years.

The age of onset of mental health disorders have been found to be harder to define than physical illnesses. The symptoms of standard mental disorders often start off non-specific. Pathological changes pertaining to disorders often become more detailed and less fickle before they can be defined in the American Psychiatric Association's DSM. The brain is a dynamic and complex system, it is constantly re-wiring itself and a major concern is what happens to the brain in earlier life that mirrors what occurs later in its psycho-pathological state.

Diseases are often categorized by their ages of onset as congenital, infantile, juvenile, or adult. Missed or delayed diagnosis often occurs If a disease that is typically diagnosed in juveniles (such as asthma) is present in adults, and vice versa(such as arthritis).

In some cases, the age of onset may be the result of mutation accumulation. If this is the case, it could be helpful to consider ages of onset as a product of the hypotheses depicted in theories of aging.

References[edit]

 * 1) Jump up ^ http://www.scoliosis.org/info.php
 * 2) Jump up ^ Jones, P. B. (2013-01-01). "Adult mental health disorders and their age at onset". The British Journal of Psychiatry. 202 (s54): s5–s10. doi:10.1192/bjp.bp.112.119164. ISSN 0007-1250. PMID 23288502.
 * 3) Campisi, J. (1996). Replicative senescence: an old lives tale?Cell84: 497-500.
 * 4) Kirkpatrick, S., Locock, L., Farre, A., Ryan, S., Salisbury, H., & McDonagh, J.E. (2018). Untimely illness: When diagnosis does not match age-related expectations. Health Expectations,21(4), 730-740.