| Description: | Before you get a headache, do you ever know one is coming - at age 31 years |
| Category: | Questionnaire data ⏵ Health and medical history ⏵ Medical conditions ⏵ Nervous system conditions |
| Participants | 2,691 | Value Type | Categorical (single) | Sexed | Both sexes | Debut | Mar 2025 | |||
| Item count | 2,691 | Item Type | Data | Instances | Defined (1) | Version | N/A | |||
| Stability | Complete | Strata | Primary | Array | No | Cost Tier | dX oX sX |
