However, discontinuities were identified for some variables from the Welsh Health Survey, Active Adults Survey, Arts in Wales Survey and the Welsh Outdoor Recreation Survey.
Fodd bynnag, nodwyd rhai enghreifftiau o annilyniant ar gyfer rhai newidynnau o Arolwg Iechyd Cymru, Arolwg Oedolion Egnïol, Arolwg y Celfyddydau yng Nghymru ac Arolwg Hamdden Awyr Agored Cymru.