Table 4.
Frequency of the MSLT, MWT, HSAT, and PSG per 100,000 persons by region: 2013–2016.
| 2013 | 2014 | 2015 | 2016 | % Change 2013–2016 | |
|---|---|---|---|---|---|
| MSLT/MWT | |||||
| Overall | 19.1 | 18.0 | 16.6 | 15.2 | −20.5 |
| Northeast | 16.1 | 14.1 | 11.5 | 11.1 | −31.5 |
| Midwest | 26.4 | 24.7 | 22.2 | 20.5 | −22.4 |
| South | 18.8 | 18.1 | 17.4 | 15.5 | −17.7 |
| West | 11.9 | 12.7 | 13.1 | 11.7 | −2.4 |
| HSAT | |||||
| Overall | 92.9 | 126.6 | 154.8 | 202.2 | 117.5 |
| Northeast | 93.4 | 133.5 | 175.9 | 199.3 | 113.3 |
| Midwest | 65.5 | 111.6 | 148.1 | 175.8 | 168.5 |
| South | 106.4 | 130.9 | 144.5 | 229.8 | 116.1 |
| West | 100.6 | 126.1 | 155.6 | 173.4 | 72.4 |
| PSG | |||||
| Overall | 640.0 | 600.5 | 573.0 | 546.1 | −14.7 |
| Northeast | 564.6 | 475.3 | 432.7 | 423.4 | −25.0 |
| Midwest | 738.0 | 732.0 | 700.2 | 660.1 | −10.6 |
| South | 669.4 | 620.4 | 584.2 | 556.2 | −16.9 |
| West | 512.5 | 541.2 | 567.1 | 523.0 | 2.1 |
Values were age- and sex-adjusted to the 2016 census. HSAT = home sleep apnea test; MSLT = multiple sleep latency test; MWT = maintenance of wakefulness test; PSG = polysomnography.