Sensitivity, specificity, positive predictive value and negative predictive value of migraine with each item of cranial autonomic symptoms with combined diagnostic features*
| Sensitivity (%) | Specificity (%) | PPV | NPV | |
| Conjunctival injection (n = 163) | 78.8 | 83.1 | 0.89 | 0.69 |
| Lacrimation (n = 283) | 80.3 | 85.6 | 0.92 | 0.67 |
| Nasal congestion (n = 153) | 66.4 | 76.7 | 0.88 | 0.47 |
| Rhinorrhoea (n = 156) | 76.6 | 79.0 | 0.85 | 0.69 |
| Eyelid oedema (n = 88) | 72.1 | 80.0 | 0.92 | 0.46 |
| Forehead/facial sweating (n = 280) | 88.1 | 42.6 | 0.87 | 0.46 |
*Presence of bilateral CAS with either mild to moderate intensity or occurrence in non-headache periods.
CAS, cranial autonomic symptoms; NPV, negative predictive value; PPV, positive predictive value.