highly significantp < 0.001
For the 1STST, the corresponding likelihood-ratio test was highly significant (χ 2 = 128.08, p < 0.001), with reference recovery at +0.018%/s, PPF essentially overlapping with reference (Δ −0.0001), and IPF reoxygenation diverging from reference by Δ −0.0347%/s.