[3][4] Her research investigates racial inequalities in mental health, including the origins of the overdiagnosis of schizophrenia in British African-Caribbean people.

The National Institute for Health and Care Excellence (NICE) guidelines include family interventions, but these are not always offered to non-white people.

Edge has shown that Black people are more likely to experience a negative pathway in mental health care compared to their white counterparts.

[10] She has shown that they are more likely to be sectioned by the Mental Health Act, which can result in the breakdown of close relationships, and make effective family interventions unlikely.

[9][12][13] Edge spent 2014 as a visiting scholar in Canada and the United States of America, where she studied how the countries supported the mental health of African Caribbean populations.