Prevalence of DVT in acute infection patients was 31.8%, in severe heart failure15.6%, in acuteexacerbation of chronic obstructive pulmonary disease 12.5%, in ischemic stroke 29.4%, in cancer 30% and in acute respiratory failure 23.5%, immobility 37.5%, smoking 22.9%, BMI<18.5 was 56%, aged 80 and older 33.3%.