| Description: | Are your headaches on one side only - at age 31 years |
| Category: | Questionnaire data ⏵ Health and medical history ⏵ Medical conditions ⏵ Nervous system conditions |
| Participants | 2,665 | Value Type | Categorical (single) | Sexed | Both sexes | Debut | Jan 2026 | |||
| Item count | 2,665 | Item Type | Data | Instances | Defined (1) | Version | N/A | |||
| Stability | Complete | Strata | Primary | Array | No | Cost Tier | dX oX sX |
