Further information on these changes can be found in the statistical bulletin on Health, disability and the provision of unpaid care in Wales and the Census 2021 dictionary (ONS).
Ceir rhagor o wybodaeth am y newidiadau hyn yn y bwletin ystadegol ar Iechyd, anabledd a darpariaeth gofal di-dâl yng Nghymru a geiriadur Cyfrifiad 2021 (SYG).