Table 1.
Characteristics of studies according to country, number of participants, age at diagnosis, age at polysomnography, and quality assessment following the Newcastle-Ottawa Scale.
| Author, Year | Country | Total number of participants | Subjects meeting eligibility criteria | Age at diagnosis (median, years) | Age at PSG (median, years) | Time since diagnosis (years) | Quality Assessment (0–9 stars) |
|---|---|---|---|---|---|---|---|
| Crowley et al. (2011) | Ireland | 28 | 7 | NA | 40.5 | NA | 5 |
| Fagioli et al. (1991) | France | 19 | 19 | 6.8 | NA | NA | 5 |
| Johnson et al. (2020) (abstract) | USA | 12 | 12 | NA | 14 | 9-72 months | 2 |
| Khan et al. (2017) | USA | 39 | 39 | 10.1 | NA | 10.2 | 6 |
| Mandrell et al. (2012) | USA | 31 | 31 | 7.4 | 14.3 | NA | 5 |
| Manley et al. (2012) | USA | 19 | 9 (data on 7) | 8 | 17.5 | 9 | 5 |
| Müller et al. (2006) | Germany | 115 | 10 | NA | NA | NA | 5 |
| O'Gorman et al. (2010) | Canada | 15 | 15 | NA | 15.5 | NA | 7 |
| Pickering et al. (2021) | Denmark | 61 | 61 | 5.6 | 12.4 | 5.3 | 6 |
| Pilotto et al. (2019) (abstract) | Italy | 16 | 12 | 9.3 | 12.5 | NA | 2 |
| Rosen and Brand (2011) | USA | 70 | 48 | NA | NA | NA | 4 |