Table 2. Results of ordered logistic regression analysis of predictive factors for topiramate prophylaxis.

Factors	OR (95% CI)	p
Headache duration	0.87 (0.95–1.32)	0.506
NRS score ≥6	0.19 (0.04–1.00)	0.050
Headache frequency	0.97 (0.93–1.01)	0.122
Impairment of daily activities	13.75 (2.35–80.48)	0.004
Nausea	0.66 (0.10–1.64)	0.209
Vomiting	0.61 (0.29–1.72)	0.447
Phonophobia	1.02 (0.36–2.56)	0.495
Photophobia	0.58 (0.31–1.77)	0.929
Dizziness	1.61 (0.51–2.45)	0.793
Visual symptoms	0.47 (0.24–1.51)	0.773

CI: confidence interval, NRS: Numeric Rating Scale, OR: odds ratio.