From: Molecular characterization and copy number of SMN1, SMN2 and NAIP in Chinese patients with spinal muscular atrophy and unrelated healthy controls
Number of normalNAIP
SMA patients (N = 42)
Healthy individuals (N = 212)
P
0
4 (9.5%)
0 (0%)
1
26 (61.9%)
15 (7.1%)
<0.001
2
12 (28.6%)
197 (92.9%)