The number of patients starting treatment within the target time will also likely to be affected by the periods where some patients were shielding and by patient choices.
Mae’n debyg y bydd y cyfnodau pan oedd rhai cleifion yn gwarchod eu hunain a dewisiadau cleifion hefyd yn effeithio ar nifer y cleifion sy’n dechrau cael triniaeth o fewn yr amser targed.