39% of those with a mental illness (including anxiety and depression) were lonely, while just 9% of those without such an illness were lonely.
Roedd 39% o'r rhai â salwch meddwl (gan gynnwys gorbryder ac iselder) yn teimlo'n unig, tra mai dim ond 9% o'r rhai heb salwch o'r fath oedd yn teimlo'n unig.