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Table 1 Estimated 2016 US SMA prevalence by type assuming a birth prevalence of 8.5 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

1455

1067

II

3567

3330

III

3504

3504

All

8526

7901

  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