Around a quarter of patients attending hospital with a suspected DVT have one ^a ; however, it is rare in the community (<0.02%) ^b especially in young people (< 0.003%). ^b

Note:

• 0.02% of women in the community develop a DVT. ^b The risk is even lower in healthy women aged less than 40 (0.003%). ^b
• 15% to 40% of patients with a suspected DVT attending hospital have one. ^a