Mutivariable analysis of 47 studies reporting prevalence of venous thromboembolism
| Beta* | 95% CI | Intercept† | P value | |
| Proportion of patients in ICU (%) | 0.0020 | 0.0012 to 0.0028 | 0.0351 | <0.0001 |
| Systematic screening (yes/no) | 0.1423 | 0.0590 to 0.2256 | 0.0351 | 0.0008 |
Number of patients (47 studies, p=0.57) and D-dimer level (28 studies, p=0.26) were not significantly associated with venous thromboembolism when added to the model.
As an example, the prevalence of venous thromboembolism in a cohort using systematic screening and including 30% of patients in the ICU is estimated at 0.0351+0.1423+0.0020×30=0.2374 (23.7%).
*Beta signification: prevalence increase or decrease for the augmentation of one unit of the variable tested.
†Intercept signification: rate of venous thromboembolism for all variables with null value.
ICU, intensive care unit.