ROX index versus HACOR scale in predicting success and failure of high-flow nasal cannula in the emergency department for patients with acute hypoxemic respiratory failure: a prospective observational study

Table 2 Descriptive statistics of potential predictors of success and failure of high-flow nasal cannula

	Time (h)	Patients remaining on HFNC	Success	Patients remaining on HFNC	Failure	p-value
ROX index	1	52	6.99 ± 2.14	23	5.66 ± 2.18	0.024
	2	52	7.69 ± 2.40	21	6.17 ± 2.37	0.021
	6	47	8.28 ± 2.66	17	6.68 ± 3.00	0.046
HACOR scale	1	52	2.61 ± 2.23	23	4.50 ± 2.77	0.015
	2	52	2.21 ± 2.23	21	4.11 ± 2.87	0.017
	6	47	1.78 ± 1.90	17	3.67 ± 2.84	0.047
Respiratory rate (breaths/min)	1	52	26.10 ± 4.69	23	30.13 ± 5.90	0.022
	2	52	25.15 ± 3.93	21	29.18 ± 5.88	0.006
	6	47	25.42 ± 3.36	17	29.41 ± 5.60	0.001
SpO₂/FiO₂ ratio	1	52	179.12 ± 45.02	23	155.03 ± 43.56	0.052
	2	52	191.31 ± 51.19	21	161.03 ± 43.87	0.020
	6	47	210.11 ± 55.96	17	157.87 ± 38.34	0.001
Pulse rate (beats/min)	1	52	90.51 ± 19.44	23	101.78 ± 19.80	0.036
	2	52	90.30 ± 19.99	21	101.29 ± 23.04	0.059
	6	47	88.98 ± 18.46	17	109.17 ± 22.54	0.002

ISSN: 1865-1380