National Survey for Wales (including information on health and health reported lifestyles previously reported as part of the Welsh Health Survey)
Arolwg Cenedlaethol Cymru (gan gynnwys gwybodaeth am iechyd a ffyrdd o fyw sy’n gysylltiedig ag iechyd a gofnodwyd yn flaenorol fel rhan o Arolwg Iechyd Cymru)