138,181 items of data are available, covering 133,913 participants, encoded using Data-Coding 100271
Defined-instances run from 0 to 1, labelled using Instancing 2
|Yes, in last 4 weeks||212|
|Yes, but more than 4 weeks ago||10664|
|Possibly, but more than 4 weeks ago||789|
: Initial assessment visit (2006-2010) at which participants were recruited and consent given
117,853 participants, 117,853 items
|Yes, in last 4 weeks||186|
|Yes, but more than 4 weeks ago||8512|
|Possibly, but more than 4 weeks ago||696|
Instance 1 : First repeat assessment visit (2012-13)
20,328 participants, 20,328 items
|Yes, in last 4 weeks||26|
|Yes, but more than 4 weeks ago||2152|
|Possibly, but more than 4 weeks ago||93|
Participant asked "Ever had eye surgery?"
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