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Dewis pwnc arall neu clirio pob hidlydd.
Nid yw holl gynnwys y cyfrifia wedi'i ryddhau. Edrychwch am ddatganiadau sydd i ddod ar y calendr datganiadau. Fel arall, gallwch greu set ddata eich fun.
Rhyddhawyd ar: 14 December 2015 | Gwybodaeth gorfforaethol
Rhyddhawyd ar: 16 April 2024 | Gwybodaeth gorfforaethol
How to take part in the Winter Coronavirus (COVID-19) Infection Study (Winter CIS) and access to the questionnaire, as well as information on how and why you were selected.
Rhyddhawyd ar: 28 November 2019 | Gwybodaeth gorfforaethol
Rhyddhawyd ar: 10 December 2018 | Gwybodaeth gorfforaethol
Rhyddhawyd ar: 16 February 2023 | Gwybodaeth gorfforaethol
How to take part in the Coronavirus (COVID-19) Infection Survey (CIS) and information on how and why you were selected.
Rhyddhawyd ar: 4 May 2023 | Gwybodaeth gorfforaethol
The Take Part study was an online survey carried out by the Office for National Statistics (ONS) between April 2020 and November 2022. The survey closed on 27 November 2022.
Rhyddhawyd ar: 30 January 2019 | Gwybodaeth gorfforaethol
Rhyddhawyd ar: 11 November 2015 | Gwybodaeth gorfforaethol
Rhyddhawyd ar: 16 February 2022 | Gwybodaeth gorfforaethol
Rhyddhawyd ar: 13 October 2023 | Gwybodaeth gorfforaethol
