Table 4 Absenteeism days per year

Munakata et al. [6]^a

7795 respondents with migraine. Data from the 2006 follow-up survey is used being part of the American Migraine Prevalence and Prevention (AMPP) Study.

Kessler et al. [36]

3655 employed or self-employed respondents in the US. Part II sample from the National Comorbidity Survey Replication, face-to-face household interviews.

Stewart et al. [14]^b

6204 respondents with migraine and active employment status from the US. Data was retrieved from the 2005 American Migraine Prevalence and Prevention (AMPP) study.

Steiner et al. [35]^c

8271 participants from 9 EU countries (Austria 644; France 876; Germany 318; Italy 487; Lithuania 573; Luxembourg 1833; Netherlands 2414; Spain 999; United Kingdom 127).

Ayzenberg et al. [7]^d

2725 adults from Russia (participants aged 18–65 years from 35 cities and nine rural areas; door-to-door survey). Of these, 1273 reported headaches.

Vo et al. [27]^e

218 patients with migraine; 2018 patients without migraine (France 39; Germany 59; UK 67; Italy 31; Spain 22).

Vo et al. [37] ^f

3106 Migraine Buddy© Smartphone users with paid work from 17 European countries.

Martelletti et al. [32]^g

6534 patients with migraine from 31 countries worldwide being employed full-time or part time.