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The significance of patient's age and sex in the interpretation of signs and symptoms in clinically suspected acute deep vein thrombosis.

876 consecutive patients with clinically suspected acute deep vein thrombosis (DVR) in the leg were studied with an ascending phlebography, and the patient's age and sex were correlated to the phlebographic diagnosis. In unoperated patients a thrombus was demonstrated significantly more often in males and in older patients than in females and in younger patients. In operated patients no correlation could be noted between the phlebographic diagnosis and patients's age and sex, but a thrombus was demonstrated significantly more often in operated than in unoperated patients. The results suggest that signs and symptoms of thrombosis are less reliable in females and younger patients than in males and older patients, when a DVT is suspected clinically in unoperated patients.