similar to the findings concerning depression in mother grandmother who make up 90 of grandparent caregivers are also susceptible to depression when they are the primary care taker of a disabled grandchild due to the additional stress of caring for the child scales used for measuring depression include studies depression scale and the depression sub scale of the brief symptom inventory other predictors if stress and burden included being African-american having lower family income having lower levels of social support and not receiving welfare support