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Table 3 Statistical indices of questionnaire diagnostic performance

From: The burden of headache in China: validation of diagnostic questionnaire for a population-based survey

 

MIG

TTH

Sensitivity (95% CI)

0.833 (0.7968–0.8699)

0.51 (0.4594–0.5575)

Specificity (95% CI)

0.99 (0.9751–0.9978)

0.99 (0.9735–0.9971)

Coincidence (95% CI)

0.97 (0.9596–0.9903)

0.91 (0.8874–0.9422)

False negative rate

0.17

0.49

False positive rate

0.01

0.01

Youden index (95% CI)

0.82 (0.6859–0.9537)

0.49 (0.3656–0.6220)

PPV (95% CI)

0.83 (0.7000–0.9667)

0.86 (0.7412–0.9731)

NPV (95% CI)

0.99 (0.9747–0.9982)

0.92 (0.8925–0.9481)

κ (95% CI)

0.82 (0.7095–0.9301)

0.59 (0.4629–0.7242)

  1. MIG migraine, TTH tension-type headache, CI confidence interval, PPV positive predictive value, NPV negative predictive value, κ Cohen’s kappa