During the COVID-19 pandemic, health boards have not performed the same level of validation on referral to treatment performance data as they had previously.
Yn ystod pandemig COVID-19, nid yw byrddau iechyd wedi cyflawni’r un lefel o ddilysu ar ddata perfformiad amser rhwng atgyfeirio a thriniaeth ag yr oeddent yn flaenorol.