There was some variation between the local health boards, with the highest sickness absence rate in Swansea Bay (7.0%) and the lowest rate in Powys (5.3%).
Roedd rhywfaint o amrywiaeth ymhlith y byrddau iechyd lleol, gyda chyfradd uchaf yr absenoldeb oherwydd salwch ym Mae Abertawe (7.0%) a’r gyfradd isaf ym Mhowys (5.3%).