A third (33%) of women aged 16 to 19 were recorded as smokers at initial assessment compared to one in ten (10%) women aged 30 or over.
Cofnodwyd bod traean (33%) o fenywod 16 i 19 oed yn smygwyr yn yr asesiad cychwynnol o gymharu ag un o bob deg (10%) o fenywod 30 oed neu hŷn.