If respondents needed to complete the survey in more than one sitting (or more than one person needed to fill in the survey), they could do so by re-entering their access code.
Pe bai angen i ymatebwyr gwblhau'r arolwg mewn mwy nag un sesiwn (neu fod angen i fwy nag un unigolyn lenwi'r arolwg), gallent wneud hynny trwy ail-fewnbynnu eu cod mynediad.