Close to six out of ten (57.2%) were aged between 40 and 59, while a fifth (19.7%) were 60 or older.
Roedd mwy na chwech o bob deg yn credu bod y pandemig wedi cael effaith negyddol ar eu hiechyd meddwl, a phedwar o bob deg eu rhagolygon am swydd yn y tymor hirach.