Previous trends showed there was no significant change in the proportion of adults who reported fewer than two healthy lifestyle behaviours between 2016-17 and 2019-20.
Roedd tueddiadau blaenorol yn dangos nad oedd newid sylweddol yng nghyfran yr oedolion a ddywedodd fod ganddynt lai na dau ymddygiad ffordd o fyw iach rhwng 2016-17 a 2019-20.