The 2014 CHETS Wales 2 survey replicated components of these earlier surveys, recruiting a sample of 75 schools, and collecting questionnaire data from 1601 children within those schools.
Yr un oedd elfennau arolwg 2014 CHETS Cymru 2 ag elfennau’r arolygon cynharaf hyn, recriwtio sampl o 75 o ysgolion a chasglu data holiadur oddi wrth 1601 o blant o’r ysgolion hynny.