Table 1.

Baseline demographics and characteristics of the OLTP population

	Total (N=254)
Age, mean (SD), years	44.3 (9.0)
Sex, female, n (%)	220 (86.6)
Migraine type*, n (%)
EM	155 (61.0)
CM	99 (39.0)
Migraine preventive treatment use, n (%)
Ever used (including prior and/or current users)	197 (77.6)
Never used	57 (22.4)
MMD, mean (SE)	12.2 (0.4)
MSMD, mean (SE)	9.4 (0.4)
MHD, mean (SE)	13.8 (0.4)

N=number of patients in the analysis set. n=number of patients with observed data.

*Based on actual data collected instead of randomisation stratification.

CM, chronic migraine; EM, episodic migraine; MHD, monthly headache days; MMD, monthly migraine days; MSMD, monthly acute migraine-specific medication treatment days; OLTP, open-label treatment period; SE, standard error of the mean.