The demography of some Health Boards has meant they have used more Primary Care including GPs and community pharmacies than others.
Mae demograffeg rhai Byrddau Iechyd wedi golygu eu bod wedi defnyddio mwy o leoliadau gofal sylfaenol, gan gynnwys practisau meddygon teulu a fferyllfeydd cymunedol, nag eraill.