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Table 2 Estimated 2016 US prevalence of SMA by type assuming a birth prevalence of 9.4 per 100,000

From: Indirect estimation of the prevalence of spinal muscular atrophy Type I, II, and III in the United States

SMA type

Estimated prevalencea

Estimated prevalenceb

I

1610

1180

II

3944

3682

III

3875

3875

All

9429

8737

  1. SMA spinal muscular atrophy
  2. aUsed published survival estimates from US literature only
  3. bUsed combined published survival estimates from the United States, Europe, and Australia
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Orphanet Journal of Rare Diseases

ISSN: 1750-1172