Comparison of ROX index with modified indices incorporating heart rate, flow rate, and PaO2/FiO2 ratio for early prediction of outcomes among patients initiated on post-extubation high-flow nasal cannula therapy

Table 3 Variables and diagnostic accuracy for HFNC outcomes at the time of ABG taken (n = 75)

		No. of patients who remain on HFNC	HFNC success	No. of patients who remain on HFNC	HFNC failure	P-value	AUROC
ROX	Pre-HFNC^#	62	15.09 (11.55–17.45)	13	14.29 (10.80–17.02)	0.566	0.551 (0.387–0.715)
	Post-HFNC^##	62	12.79 (9.95–19.22)	13	9.10 (7.09–11.01)	0.003**	0.767 (0.623–0.911)
POX-HR-flow	Pre-HFNC^#	62	13.39 (10.15–21.64)	13	12.05 (9.38–20.58)	0.769	0.526 (0.359–0.693)
POX-HR-flow	Post-HFNC^##	62	15.27 (8.53–20.91)	13	8.09 (5.62–10.86)	0.003**	0.767 (0.629–0.904)

*P-value < 0.05; **P-value < 0.01, # 5.32 h (IQR 3.67–7.34) pre-HFNC initiation, ## 1.42 h (IQR 1.03–3.08) post-HFNC initiation

ISSN: 2047-783X