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Table 2 Summary of receiver operating characteristic (ROC) performance. Area under the classification curve (AUC) for assignment of PI-CFS subjects at 6, 12 and 24 months post-diagnosis with IM using a linear discriminant models with terms selected as optimal at each time point using s stepwise selection method. Classification performance based on glucose levels measured at 6 months is included for comparison and was specified on the basis of t and ranksum tests

From: Tracking post-infectious fatigue in clinic using routine Lab tests

  Area Std. errora Asymptotic Sig.b Asymptotic 95 % Conf. interval
Model Lower bound Upper bound
ACTH (6 months) 0.77 0.10 0.02 0.58 0.96
Glucose (6 months)c 0.73 0.11 0.05 0.52 0.95
Estradiol (12 months) 0.78 0.09 0.02 0.60 0.97
Neutrophil (24 months) 0.83 0.09 0.01 0.64 1.00
  1. The test result variable(s): acth1 has at least one tie between the positive actual state group and the negative actual state group. Statistics may be biased
  2. aUnder the nonparametric assumption
  3. bNull hypothesis: true area = 0.5
  4. cModel specified on the basis of t and ranksum tests, not as a result of stepwise selection