Over a third (37%) of children not looked after and not on the child protection register had a disability, compared to 10% of children looked after and 5% of children on the child protection register.
Adroddwyd bod gan gyfran uwch o blant ar y gofrestr amddiffyn plant (9%) broblem camddefnyddio sylweddau na'r rhai sy'n derbyn gofal neu ddim yn derbyn gofal a ddim ar y gofrestr amddiffyn plant (7%).