Table 3

Diagnostic accuracy of exhaled breath analysis in OSA

 PredictedTotal
OSANo OSA
Condition
 OSA13114
 No OSA21113
Total151227
  • Confusion matrix of leave-one-out-cross-validation.

  • Summary of leave-one-out-cross-validation performance: correct prediction rate 88.9%; sensitivity 92.9%; specificity 84.6%; positive predictive value 86.7%; negative predictive value 91.7%; positive likelihood 6.036 and negative likelihood 0.084.

  • OSA, obstructive sleep apnoea defined by oxygen desaturation index ≥15/h.