| Study | Benjilali et al. 2016 [3] | Our study |
| Behcet disease | 10; 32.2% | 2; 3.7% |
| Oral contraceptives | 4; 12.9% | 2; 3.7% |
| Idiopatic | 4; 12.9% | 20; 37% |
| Myeloproliferative syndrom | 2; 6.45% | 2; 3.7% |
| Hereditary thrombophylia | 1; 3.2% | 7; 12.9% |
| Systemic erythematous lupus | 1; 3.2% | 0 |
| Antiphospholipid syndrom | 1; 3.2% | 3; 5.5% |
| coeliac disease | 1; 3.2% | 2; 3.7% |
| cancers | 0 | 8; 14.8% |
| pancreatitis | 0 | 5; 9.2% |
| others | 2; 6.4% | 5; 9.2% |