Table 3 The ROX, mROX, ROX-HR, and mROX-HR indices predict HFNC success

Baseline ROX [M(P₂₅, P₇₅)]

7.5 (6.0–10.6)

7.4 (5.4–8.4)

0.970–3.994

Baseline mROX [M(P₂₅, P₇₅)]

6.1 (4.3–9.0)

5.2 (4.0–6.5)

1.233–5.613

Baseline ROX-HR [M(P₂₅, P₇₅)]

7.6 (5.3–11.7)

6.0 (5.0–7.3)

1.259–7.210

Baseline mROX-HR [M(P₂₅, P₇₅)]

6.8 (4.2–9.8)

4.2 (3.4–5.7)

1.526–10.402

2 h ROX [mean ± SD]

8.3 ± 2.5

5.4 ± 2.3

2.434–14.613

2 h mROX [M(P₂₅, P₇₅)]

8.7 (6.0–12)

3.7 (2.6–5.5)

3.373–34.689

2 h ROX-HR [mean ± SD]

8.9 ± 3.7

4.9 ± 2.6

2.797–27.038

2 h mROX-HR [M(P₂₅, P₇₅)]

8.9 (5.8–12.6)

3.6 (2.3–4.1)

3.758–60.190