Abnormal illness behaviour and anxiety in acute non-organic abdominal pain.

Of 105 patients admitted to a surgical ward with acute abdominal pain, 18 were considered to be without evidence of any organic aetiology for this symptom. These 'non-organic' patients were almost all female and differed from the 'organic' patients in state anxiety and in the illness behaviour questionnaire scales of psychological versus somatic perception, denial and affective disturbance. The two groups of patients could be differentiated on the basis of scores derived from the Illness Behaviour Questionnaire, and the State-Trait Anxiety Inventory.