Background
People who are lesbian, gay or bisexual (or “sexual minority” people) are almost twice as likely as heterosexual people to suffer from common mental health disorders including depression, anxiety and suicide attempts. However, the study of sexuality differences in mental health problems is hampered by poor measurement of sexuality itself. This is because sexuality can be measured in several ways or people can misunderstand questions about it. This means we cannot decide who counts as a sexual minority and so our measurement of their health problems is imprecise. This problem will reduce the effectiveness of existing treatments (such as psychological treatment for depression and anxiety) as they will not be tailored to the appropriate group.
Novelty & Importance
By improving the classification of sexual minority groups and mental health disorders this project will allow researchers to predict and stratify treatment response among sexual minority sub-groups to existing psychological interventions for common mental health problems. Doing this will help reduce sexuality-related inequities in mental health care provision which is a public health priority (https://www.england.nhs.uk/about/equality/equality-hub/patient-equalities-programme/lgbt-health/).
Aims & Objectives
To conduct an exhaustive analysis of existing sexual orientation and mental health outcome data in large-scale UK cohort samples deposited in the UK Data Service. The methods will involve data pooling where similar measures of the variables of interest are available. The candidate will then test the structure of sexual orientation; test competing statistical approaches; and whether group membership predicts depression, anxiety, and suicide attempts. A LGBTQ+ PPIE Group will advise on research questions, framing, and dissemination.

