However, it is useful in looking at overall levels of absence and trends at the Wales level and looking at patterns between pupils with different characteristics e.g., free school meals.
Fodd bynnag, mae'n ddefnyddiol edrych ar lefelau cyffredinol o absenoldeb a thueddiadau ar lefel Cymru ac edrych ar batrymau rhwng disgyblion â nodweddion gwahanol e.e.