Prevalence and incidence data of<unk><unk><unk>  vary widely due to the lack of standard diagnostic criteria. Diagnosis of<unk><unk><unk>  is made during 2 broad age peaks; the first age peak occurs at 5 years. The second age peak occurs in girls aged 10-13 years and boys aged 12-16 years. There is no apparent racial difference in the incidence of GHD. In societies that concern more about male short stature than the females, 73% of males were found to have idiopathic GHD. When GHD is caused from organic causes such as tumors and radiation, in which no gender bias should be present, there was still 62% male.
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