| Â | Maximum incidence | Minimum incidence | Average |
|---|
Type | freq. × 10-6 | fraction | freq. × 10-6 | fraction | ×10-6 | fraction |
|---|
DMD/BMD | 354 | 1/2825 | 186 | 1/5376 | 270 | 1/3703 |
Other dystrophies | 100 | 1/10000 | 41 | 1/24390 | 70 | 1/14286 |
Congenital myopathies | 219 | 1/4566 | 100 | 1/10000 | 160 | 1/6250 |
Total
| 673 | 1/1486 | 327 | 1/3050 | 500 | 1/2000 |
- DMD mean incidence is well established at 300 × 10-6 (Emery 2002) but data varies from country to country and survey to survey. It is unlikely to be much higher but may be as low as 169 × 10-6 (Cowan 1980). BMD frequency is based on (Emery 1991). Thankfully, both DMD and BMD incidence is probably declining annually due to genetic testing and counselling.
- Other dystrophy incidence numbers are scarce to non-existent. The rough estimate maximum is extrapolated from (Bushby 2001) and minimum from (Emery 2002).
- Other congenital myopathy numbers are also scarce to non-existent. The maximum estimate is extrapolated from (Nonaka 2001) as 81% of the mean DMD incidence. The minimum estimate is extrapolated from (D'Amico 2008) and (Lopate 2007).
- These data were used for estimation of testing cost and should be considered as rough estimates only.
