Description: | Visual changes before or near the onset of headaches |
Category: | Online follow-up ⏵ Experience of pain |
Participants | 55,945 | Value Type | Categorical (single) | Sexed | Both sexes | Debut | Dec 2020 | |||
Item count | 55,945 | Item Type | Data | Instances | Singular | Version | Dec 2020 | |||
Stability | Accruing | Strata | Primary | Array | No | Cost Tier | dX o1 s1 |