Fig. 2

Prevalence of DVT increased with age in patients with ARDS. The prevalence of DVT increased with age in patients with both direct (red line) and indirect ARDS (blue line). However, the occurrence of DVT increased more significantly with increasing age in the direct ARDS than in the indirect ARDS group (test for interaction; P = 0.030). Data are adjusted for level of serum creatinine, procalcitonin levels, D- dimer levels, PaO₂/FiO₂, and invasive mechanical ventilation. Abbreviations: ARDS, acute respiratory distress syndrome; DVT, deep vein thrombosis; FiO₂, fraction of inspired oxygen; PaO₂, partial pressure of arterial oxygen