Table 2 Comparison of ROC curves of AHT% and AHI for predicting ESS ≥ 11.

From: A novel parameter is better than the AHI to assess nocturnal hypoxaemia and excessive daytime sleepiness in obstructive sleep apnoea

Test result variable(s)

Area

Std. errora

Asymptotic Sig.b

Asymptotic 95% confidence interval

Lower bound

Upper bound

AHT%

0.632

0.050

0.008

0.535

0.730

AHI

0.588

0.048

0.081

0.493

0.682

  1. The test result variable(s): AHI has at least one tie between the positive actual state group and the negative actual state group. Statistics may be biased.
  2. Columns indicate metrics of regression performance, including the coefficient. Plots from the ROC analysis are shown in Fig. 2.
  3. aUnder the nonparametric assumption.
  4. bNull hypothesis: true area = 0.5.
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