There are some differences between male and female personality disordered offenders. First, fewer women present a high risk of serious harm to others, although large numbers of personality disordered women received short prison sentences for offences like deception, theft, drugs and prostitution. Second, female offenders are more likely to have experienced trauma as a result of domestic violence, sexual abuse and separation from their children; they are more likely to self-harm and to present a higher risk of suicide than male PD offenders.

Black African and black Caribbean offenders tend to be over-represented in mental health services for people with a severe mental illness, but under-represented in personality disordered offender services. It is not quite clear why this is the case, but it is important to be particularly careful and think about possible biases in attitudes and assumptions when assessing for PD in black and ethnic minority offenders.