Narcissistic personality disorder, also known as NPD, is a personality disorder in which the individual has a distorted self image, unstable and intense emotions, is overly preoccupied with vanity, prestige, power and personal adequacy, lacks empathy, and has an exaggerated sense of superiority. NPD is closely associated with egocentrism - a personality characteristic in which people see themselves and their interests and opinions as the only ones that really matter.
Participants (N = 900; age range 12-93 (M = 28.95, SD = 12.64; 70% female) were monitored daily in terms of suicidal ideation, depression, anxiety, worthlessness and perceptions of not coping. Latent Growth Curve Analysis was used to check if groups of inpatients reporting suicidal ideation, who shared early change in measures of psychological distress, existed. Logistic regression tested whether different groups were at higher (or lower) risks of deliberate self-harm.