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Mask ratings after one-night trials for all ten custom-fit masks and two control noncustom-fit masks. Median was calculated based on responses for masks 1–10 only
| Mask | Q1: comfort | Q2: leakage | Q3: preference | Q4: recommendation | Q5: tolerance |
|---|---|---|---|---|---|
| Previous | 3 | 3 | 3 | 3 | 2 |
| 0 | 2 | 1 | 1 | 1 | 1 |
| 1 | 4 | 3 | 4 | 4 | 4 |
| 2 | 4 | 2 | 4 | 3 | 3 |
| 3 | 5 | 3 | 5 | 4 | 4 |
| 4 | 4 | 2 | 4 | 3 | 3 |
| 5 | 2 | 2 | 3 | 3 | 1 |
| 6 | 4 | 3 | 4 | 4 | 4 |
| 7 | 4 | 3 | 4 | 4 | 4 |
| 8 | 5 | 4 | 5 | 4 | 5 |
| 9 | 4 | 3 | 4 | 3 | 4 |
| 10 | 1 | 1 | 1 | 1 | 1 |
| Median | 4.0 | 3.0 | 4.0 | 3.5 | 4.0 |
