Clinical and Genetic Study of Algerian Patients with Spinal Muscular Atrophy

Table 6

Analysis of the SMN2 copy number in the 62 patients with homozygous absence of the SMN1 gene.

SMA type	𝑁 patients	SMN2 copy number
		1	2	3	4	5
I	15	2 (13%)	9 (60%)	4 (26%)	0	0
II	12	0	2 (16%)	7 (58%)	3 (25%)	0
III	33	0	0	5 (15%)	27 (81%)	1 (3%)
IV	2	0	0	0	0	2 (100%)