Data were collected from children aged 3-4 years with and without a health condition. Proxy respondents, typically a parent, completed the Toddler and Infant (TANDI) Health Related Quality of Life instrument, EQ-5D-Y-Proxy version 1 and the Paediatric Quality of Life Inventory (PedsQL). <div><br></div><div>Data is anonymised and all personal identifiers have been removed. Informed consent was obtained
from all subjects involved in the study </div>
Funding
EuroQoL Research Foundation (EQ Project 20170540).