Stigma may influence how a psychiatric diagnosis is accepted, whether treatment will be adhered to and how people with mental illness function in the world. However, perceptions of mental illness and diagnoses can be helpful and non-stigmatising for some patients.

This self-report questionnaire, which can be completed in 5-10 min, may help us understand more about the role of stigma of psychiatric illness in research and clinical settings.

isrctn.org Identifier: ISRCTN18271323.

Contrary to previous findings, we found no evidence that two weeks of exogenous melatonin is effective in improving sleep in people with dementia, although possible benefits of melatonin following longer periods of administration cannot be discounted.