This section reports findings for those who had at least one respiratory issue recorded by their GP in the first place.
Dyma’r arolwg rhyngwladol cyntaf lle mai'r claf ei hun sy'n adrodd o ganlyniadau a phrofiadau iechyd oedolion sydd ag o leiaf un cyflwr cronig sy'n cael eu trin mewn lleoliadau gofal sylfaenol.