Data
114,700 items of data are available, covering 107,618 participants, encoded using Data-Coding
100349.
Defined-instances run from 0 to 3, labelled using Instancing
2.
4 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
102,936 participants, 102,936 items
Instance 1 : First repeat assessment visit (2012-13)
2,547 participants, 2,547 items
Instance 2 : Imaging visit (2014+)
8,464 participants, 8,464 items
Instance 3 : First repeat imaging visit (2019+)
753 participants, 753 items
Notes
ACE touchscreen question "Have you had headaches for more than 3 months?"
Field 3799 was collected from participants who indicated that in the last month they experienced headache that interfered with their usual activities, as defined by their answers to Field 6159