Table 2.
Tolerability Questionnaire results∗.
| Individual question results | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Median (minimum to maximum) | |||||||||
| General comfort | Nasal interface weight | Noise | Nasal passage comfort | Ease of breathing through nose | |||||
| NHF 37C | NHF 41C | NHF 37C | NHF 41C | NHF 37C | NHF 41C | NHF 37C | NHF 41C | NHF 37C | NHF 41C |
|
| |||||||||
| 2.5 (1 to 3) | 3.0 (1 to 4) | 1.5 (1 to 3) | 2.0 (1 to 3) | 2.0 (1 to 3) | 3.0 (2 to 4) | 2.0 (1 to 3) | 2.0 (1 to 3) | 2.5 (1 to 4) | 3.0 (1 to 4) |
|
| |||||||||
| Difference in proportion that scored 3 or above (95% CI), NHF 41C minus NHF 37C∧ | |||||||||
| General comfort | Nasal interface weight | Noise | Nasal passage comfort | Ease of breathing through nose | |||||
|
| |||||||||
| 30% (1.6 to 58.4) P = 0.25 | 0% (−39.2 to 39.2) P = 0.99 | 20% (−4.8 to 44.8) P = 0.50 | 20% (−4.8 to 44.8) P = 0.50 | 20% (−4.8 to 44.8) P = 0.50 | |||||
|
| |||||||||
| Free text comments# | |||||||||
| Intervention | Difficulty in breathing through the nose | Damp/dripping nose | Noise of machine | Decreased mobility | Sneezing | ||||
|
| |||||||||
| NHF 37C | 5 | 5 | 1 | 2 | 0 | ||||
| NHF 41C | 9 | 5 | 4 | 3 | 2 | ||||
N = 10. ∗On a five-point Likert scale, values close to one are favourable and values close to five are less favourable; ∧ P values by McNemar's exact test, confidence intervals by asymptotic method. #The same participant could be counted twice if they made the same comment for each intervention.