Table 2 Epidemiological data
From: Cost-effectiveness analysis of interventions for migraine in four low- and middle-income countries
Epidemiological variable | Sub-group | China | India | Russian Federation | Zambia |
|---|---|---|---|---|---|
Migraine prevalence (18–65 years) | Male | 5.4% | 19.4% | 12.6% | 18.0% |
| Â | Female | 12.6% | 32.8% | 30.4% | 27.1% |
Case distribution (attacks per month) | Low frequency [<3] | 62% | 63% | 52% | 50% |
|  | High frequency [≥3] | 38% | 37% | 48% | 50% |
Mean attacks (per month) | Low frequency | 1.05 | 1.05 | 1.2 | 0.56 |
| Â | High frequency | 5.65 | 4.59 | 6.4 | 3.94 |
Mean duration of attack (hours) | All cases | 23.4 | 13.1 | 15.0 | 36.4 |
Time spent in ictal state (per year) | Low frequency | 3.4% | 1.9% | 2.5% | 2.8% |
High frequency | 18.1% | 8.2% | 13.2% | 19.7% |