Personality disorders are a form of mental disorder. They are characterised by a long-term pattern of serious behavioural differences that significantly affect the functioning of the individual in personal and social situations.
Some types of personality disorder that have been defined are:
... with them, 47.1% are married couples living together, 11.1% have a female householder with no husband present, and 38.1% are non-families. 32.7% of all households are made ...