You suspect a patient with severe depressive illness may hold a delusion of guilt but they have not mentioned it spontaneously. Which single question would most efficiently open this area for direct exploration?

Delusions of guilt are often held with shame and not volunteered spontaneously, so a direct, non-judgemental question specifically about wrongdoing and deserved punishment is the most efficient way to open this area. Once such content is confirmed, a direct suicide and self-harm risk assessment should always follow, given the well-recognised association between depressive delusional guilt and a sense of deserving to suffer or die. General questions about sleep or relationships may surface useful context but will not reliably elicit this specific delusional content on their own.

Key discriminating feature: A direct, open question about wrongdoing and deserved punishment is needed because delusions of guilt are frequently not volunteered spontaneously, particularly when the person feels ashamed of the supposed wrongdoing itself.

Common misconception: Sleep and general history questions are useful background but will not surface delusional guilt content on their own; it must be asked about directly and explicitly.

Clinical interviewing principle: Once any depressive delusional content is confirmed, follow immediately with a direct suicide risk assessment, since delusions of guilt carry a well-recognised association with a sense of deserved punishment and elevated risk — but the opening question should target the belief itself first, to establish what, specifically, the person believes.