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

Table 3

Etiology distribution in the patients with genetic diseases in Table 2.

Etiology categories	Disease types	Case number	Proportion	Concrete diseases (case number)
IEMs	27	66	64.7%	Detailed information in Table 4
Congenital dysmorphic diseases	14	22	21.6%	Detailed information in Table 5
Chromosomal abberations	4	6	5.9%	Detailed information in Section 3.5
Endocrine disorders	3	4	3.9%	Hypoparathyroidism (1), Pseudohypoparathyroidism (1), Congenital hypothyroidism (2)
Others	2	4	3.9%	Congenital muscular dystrophy (3), Progressive muscular dystrophy (1)
In total	50	102	100%	—