Data
99,407 items of data are available, covering 96,441 participants, encoded using Data-Coding 
100267.
Defined-instances run from 0 to 1, labelled using Instancing 
2.
 
2 Instances
Instance 0 : Initial assessment visit (2006-2010) at which participants were recruited and consent given
79,110 participants, 79,110 items
Instance 1 : First repeat assessment visit (2012-13)
20,297 participants, 20,297 items
 
Notes
Exercise safety question 3, asked prior to fitness test
"In the past month, have you had chest pain when you were NOT doing physical activity"