Willson 2004.
| Methods | Single‐centre, cross‐over, open study | |
| Participants | 16 participants with neuromuscular diseases (n = 3), chest wall diseases (n = 5) or non‐neuromuscular and non‐chest wall diseases (n = 8) | |
| Interventions | Control: nocturnal ventilation with bilevel airway pressure using nasal mask Experimental: nocturnal ventilation with bilevel airway pressure using full face mask | |
| Outcomes | Short‐term (1‐night treatment) effects on sleep parameters | |
| Notes | — | |
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | Unclear risk | Information was not provided |
| Allocation concealment (selection bias) | Unclear risk | Information was not provided |
| Blinding of participants and personnel (performance bias) All outcomes | High risk | No party was blinded to the intervention |
| Blinding of outcome assessment (detection bias) All outcomes | High risk | The outcome assessor was not blinded to the intervention |
| Incomplete outcome data (attrition bias) All outcomes | Low risk | No loss to follow‐up |
| Selective reporting (reporting bias) | Low risk | Outcomes presented in the results section matched those reported in the methods |
ALS: amyotrophic lateral sclerosis CO2: carbon dioxide FVC: forced vital capacity NIV: non‐invasive ventilation PaCO2: carbon dioxide tension SaO2: oxygen saturation