Shoplifting in the mentally ill: The role of bipolar affective disorder and mental retardation

This study explores shoplifting behaviour in mentally ill patients, and evaluates the association between shoplifting and different mental illnesses in a local Chinese population. A comparison is made between shoplifting offenders and a matched control group of non-offenders among the psychiatric patients registered at a university department of psychiatry. Major depression, bipolar affective disorder (BAD) and mental retardation (MR) are the most common diagnoses among mentally ill shoplifters, while patients with a diagnosis of BAD or MR are at higher risk of committing an offence than patients with other diagnoses. Bipolar affective disorder has not been described as a risk factor for shoplifting behaviour in the psychiatric literature. Such a possibility should be seriously considered in the psychiatric assessment of shoplifting cases.