# Coded variables in  NHS Wales datasets
>Last modified: 20 Jun 2025
<div style="background-color: rgba(0, 178, 169, 0.3); padding: 5px; border-radius: 5px;"><strong>Clinical classification systems are used to code information collected about patients in the NHS Wales datasets.</strong></div>  
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 Content will be added when the NHS Wales data have flowed into the UK LLC Trusted Research Environment (TRE).