Clinical features predicting secondary headache (prior odds of secondary headache = 18.8%)
| Clinical feature | Weight of evidence | Posterior odds (%) |
|---|---|---|
| Plantars up-going | 17 | 55.0 |
| Plantars equivocal | 12 | 52.6 |
| Temperature>38°C | 12 | 52.6 |
| Age>65 years | 14 | 47.5 |
| Abnormal respiratory examination | 13 | 45.0 |
| Pain stabbing in character | 10 | 37.8 |
| Neck stiffness | 8 | 33.2 |
| Pulse>90 bpm | 8 | 33.2 |
| Systolic BP>160 mm Hg | 7 | 31.0 |
| Diastolic BP>100 mm Hg | 7 | 31.0 |
| Abnormal cranial nerve examination | 7 | 31.0 |
| Pain in the orbit | 6 | 28.9 |
| Abnormal auroscopy | 6 | 28.9 |
| Abnormal CVS examination | 5 | 26.9 |
| Abnormal limb power | 5 | 26.9 |