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Dependent personality disorder matters because the person organises their whole life around being cared for by others, to the point of tolerating mistreatment to avoid being alone. It is a Cluster C ('anxious/fearful') personality disorder marked by an excessive need to be looked after, leading to submissive, clinging behaviour and fear of separation. For example, imagine a woman who cannot decide what to eat for dinner without ringing her partner first for reassurance. In practice, that difficulty making everyday decisions without excessive advice is one of the clearest bedside clues.

Core features include difficulty making everyday decisions without excessive reassurance, needing others to take responsibility for major life areas, difficulty expressing disagreement from fear of losing support, and going to excessive lengths to obtain nurturance from others. The person feels helpless when alone and urgently seeks a new relationship as a source of care when one ends. Say a patient remains in a controlling relationship, fearing that leaving would mean being unable to cope alone at all. In practice, this fear of being unable to care for oneself, more than any single symptom, drives the clinging behaviour.

• A clinician considers dependent personality disorder in a woman from a culture with strongly interdependent family roles. Which step is most important?
• A woman with dependent personality disorder remains with a partner who treats her badly. Which feature best explains her staying?
• A man became clingy and indecisive only after a depressive episode began six months ago. What is the most likely explanation?

• Borderline personality disorder, affective instability, identity disturbance and self-harm, unlike dependent personality disorder's calmer, caretaking-seeking pattern.
• Avoidant personality disorder, submissiveness driven by fear of criticism, rather than dependent personality disorder's fear of losing care and support.
• Dependent personality disorder, difficulty making everyday decisions without reassurance, unlike the situational indecision seen in generalised anxiety disorder.
• Dependent personality disorder, urgently seeks a new relationship after one ends, whereas grief after bereavement does not typically drive this urgent replacement-seeking.

• Conflict is avoided rather than enjoyed in this pattern.
• A sense of superiority points to a narcissistic rather than dependent presentation.
• Applying criteria without cultural context risks mislabelling ordinary behaviour as disorder.
• Recording an uncertain diagnosis and deferring review leaves a potentially harmful label in place.
• A relative's view is useful collateral but cannot substitute for a cultural formulation.

• Extract the defining phenomenology, duration, severity and functional-impact clues.
• Match the pattern to the most specific diagnostic or assessment construct.
• Actively test the closest look-alike against the missing or contradictory clue.
• Choose the precise term rather than a broader category that is merely compatible.