Etiological Analysis of Neurodevelopmental Disabilities: Single-Center Eight-Year Clinical Experience in South China

Table 2

Etiology distribution in the whole cohort of NDDs.

Etiology categories	Disease types	Case number	Proportion	Concrete disease (case number)
Genetic diseases	50	102	35.8%	Detailed information in Table 3
Psychobehaviour	3	23	8.1%	Autism (21, including 5 cases of Rett syndrome); ADHD (2)
Acquired brain injuries	2	7	2.4%	Kernicterus (4); HIE (3)
Other etiology	2	15	5.3%	Cerebral palsy (7), Epilepsy (8)
Unknown	1 (NDDs)	138	48.4%	No concrete etiologies were identified at the current stage
In total	58	285	100%	—