Subgroup analysis to explore heterogeneity in estimate of VTE prevalence
| Studies (k) | Patients (n) | Prevalence (%) (95% CI) | I2 (%) | P value | |
| Approach to VTE diagnosis | 0.04 | ||||
| Asymptomatic screening | 12 | 842 | 25.2 (13.5 to 39.1) | 95 | |
| Symptomatic testing only | 44 | 15 665 | 12.7 (10.1 to 15.4) | 96 | |
| Patients in ICU | <0.0001 | ||||
| >70% | 26 | 1686 | 23.2 (17.4 to 29.6) | 92 | |
| ≤70% | 30 | 14 052 | 9.0 (6.9 to 11.4) | 95 | |
| Prospective series | 0.64 | ||||
| Yes | 12 | 14 653 | 13.1 (10.4 to 16.1) | 96 | |
| No/unknown | 44 | 1828 | 22.0 (12.9 to 32.7) | 96 | |
| Multicentric series | 0.10 | ||||
| Yes | 12 | 2808 | 28.5 (16.2 to 42.6) | 98 | |
| No | 44 | 13 673 | 14.3 (10.6 to 18.5) | 94 | |
| Consecutive series | 0.42 | ||||
| Yes | 14 | 11 495 | 15.5 (12.2 to 19.2) | 96 | |
| No/unknown | 42 | 4986 | 12.7 (7.7 to 18.8) | 95 |
ICU, intensive care unit; VTE, venous thromboembolism.