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Comparison of the distribution of SMN2 copy number in SMA patients and healthy individuals
| Number of normal SMN2 | SMA patients (N = 42) | Healthy individuals (N = 212) | P |
|---|---|---|---|
| 0 | 0 (0%) | 10 (4.7%) | |
| 1 | 2 (4.8%) | 70 (33.1%) | |
| 2 | 14 (33.3%) | 130 (61.3%) | <0.001 |
| 3 | 24 (57.1%) | 2 (0.9%) | |
| 4 | 2 (4.8%) | 0 (0%) |
