It is difficult to know the exact number of children who have a chronic<unk>  worldwide. Given that there is no agreement on the definition for a chronic<unk>  and that quality data from every country is not guaranteed, there is a wide range of estimates of prevalence and incidence. In the United States, one study noted the prevalence of chronic conditions among youth more than doubled from 12.8% in 1994 to 26.6% in 2006. One important trend to consider is that the overall number of children with chronic<unk> es is increasing. This rise is likely due to decreased infant and child mortality from previously lethal diseases due to innovations in medication and other treatment as well as increased ability to diagnose and therefore discover chronic conditions.
Childhood chronic illness
Premorbidity
Childhood chronic pain
Childhood trauma
Childhood obesity
History of mental disorders
Learning problems in childhood cancer
History of dental treatments