Outcome | Study group | P value | |
---|---|---|---|
NIV success (n = 8) | NIV failure (n = 10) | ||
Diaphragm thickening fraction in the first 96Â h after enrolment (%) | |||
 1st operator | 54.6 (47.3–61.9) | 31.8 (26.1–37.6) | < 0.001 |
 2nd operator | 48.1 (42.9–53.3) | 37.3 (29.8–44.8) | 0.016 |
 Mean between the 2 operators | 52.1 (45.7–58.5) | 34.3 (28.6–40) | < 0.001 |
Respiratory rate/Diaphragm thickening fraction in the first 96Â h after enrolment | |||
 1st operator | 0.55 (0.45–0.66) | 1.4 (1.1–1.6) | < 0.001 |
 2nd operator | 0.61 (0.49–0.73) | 1.1 (0.89–1.28) | < 0.001 |
 Mean between the 2 operators | 0.58 (0.47–0.69) | 1.24 (1.05–1.42) | < 0.001 |
PaO2/FiO2 ratio in the first 96Â h after enrolment (mmHg) | |||
 | 236 (206–267) | 163 (144–183) | < 0.001 |
PaCO2 in the first 96Â h after enrolment (mmHg) | |||
 | 35 (32–38) | 35 (32–39) | 0.99 |
Respiratory rate in the first 96Â h after enrolment, breaths per minute | |||
 | 24 (22–27) | 31 (28–33) | < 0.001 |