Mental health - Special interest

Late life psychosis may be caused by organic conditions including: delirium, dementia, drug intoxication or withdrawal, or a general medical condition. In these situations there should be evidence of a temporal relationship between the psychosis and the underlying condition. Around 60% of older adults presenting with new onset psychosis have an identifiable underlying organic cause. If an underlying medical condition can be excluded, and there is no evidence to support a diagnosis of delirium or dementia, then the cause of psychosis may be functional. This is more likely if there is a family or personal history of mental illness.

Obsessive compulsive disorder (OCD) consists of obsessions (repetitive, intrusive thoughts, urges, impulses or doubts) and compulsions (ritualistic, deliberate behaviours performed in response to obsessions). As well as contamination and safety fears, many patients experience distressing thoughts of causing harm. Sexual obsessions are common, including thoughts regarding sexual orientation, aggressive sexual behaviour or child molestation. Typical compulsions include checking, washing, ruminating, and counting.

Autism spectrum disorder (ASD) is a complex pervasive neurodevelopmental disorder with an estimated lifetime prevalence of 1%. ASD presents across a wide range of intellectual ability and persists throughout life. Core symptoms include abnormal social interaction and communication, restricted and repetitive interests or activities, associated with lack of cognitive flexibility, and unusual sensory responses. ASD is highly heritable and polygenic. The male:female ratio of ASD is 3:1. Although the behavioural presentation has a childhood onset, approximately 40% of children with ASD are undiagnosed.

Type 2 or complex trauma results from multiple or repeated traumatic events occurring over extended periods. Complex trauma is often associated with other adversity and stressors such as neglect, loss or deprivation. For many individuals these traumas occur at a developmentally vulnerable time with the perpetrator often in a caregiving role. Patients who have experienced complex trauma should be assessed for the core symptoms of PTSD. In addition, patients should be assessed for disturbances in the three domains of emotional dysregulation, negative self-concept and interpersonal disturbances.

The postnatal period appears to be associated with higher rates of adjustment disorder, generalised anxiety disorder, and depression. Women who have a history of serious mental illness are at higher risk of developing a postpartum relapse, even if they have been well during pregnancy. Postnatal depression is more severe than baby blues, follows a chronic course and may relapse outside the perinatal period. Bipolar disorder may present as a first depressive episode in pregnancy or the postnatal period. In the postpartum period women have a high risk of severe relapse.

Loneliness is associated with an increased risk of developing depression, a longitudinal cohort study has found. The English Longitudinal Study of Ageing (ELSA) recruited 11,391 participants aged 50 years and over who were living in a private household in 2002. Participants were followed up every two years until 2016/17.

Recent or current substance use disorder is associated with treatment resistance in patients who receive prescription treatment for depression, a nested case control study has found.