The prevalence and severity of loneliness and deficits in perceived social support among who have received a 'personality disorder' diagnosis or have relevant traits: a systematic review.

The quality of evidence is judged as low quality. However, given the distressing nature of loneliness and the known negative effects of loneliness on mental health and recovery, it is important for future research to explore mechanisms by which loneliness may exacerbate 'personality disorder' symptoms and the impact this has on recovery.