Width:length ratios of the laryngeal opening, off and on CPAP (mean and coefficient of variation) and percentage change in ratio in nine infants studied
| Case No | Off CPAP | On CPAP | % Change |
|---|---|---|---|
| 1 | 0.47 (14.9) | 0.69 (21.7) | +47 |
| 2 | 0.73 (17.8) | 0.88 (21) | +21 |
| 3 | 0.64 (6.9) | 0.72 (9.9) | +12.5 |
| 4 | 0.58 (6.9) | 0.71 (9.9) | +22.5 |
| 5 | 0.43 (25.6) | 0.63 (9.5) | +46.5 |
| 6 | 0.56 (10.7) | 0.74 (21.6) | +32.1 |
| 7 | 0.76 (0) | 0.92 (31.5) | +21 |
| 8 | 0.6 (3.3) | 0.75 (13.3) | +25 |
| 9 | 0.68 (10.3) | 0.64 (14.1) | −6 |
| Mean | 0.61 (11.8) | 0.74 (15.6) | +24.6 |