Table 1.
The demographic features of the population
| Risk factors | Number of patients | % |
|---|---|---|
| Age > 65 years | 64 | (60.4) |
| Smoking history | 22 | 20.8 |
| Deep venous thrombosis | 71 | 67 |
| Congestive heart failure * | 33 | 31.1 |
| Rhythm disturbances * | 28 | 26.4 |
| Malignancy | 25 | 23.6 |
| Obesity | 23 | 21.7 |
| Congestive respiratory failure | 19 | 17.9 |
| Bed rest | 16 | 15.1 |
| Surgery ** (during the last 3 months) | 10 | 9.4 |
| Trauma * (during the last 3 months) | 7 | 6.6 |
| Oral contraceptive therapy/Hormone replacement therapy | 3 | 2.8 |
* 16 (15.1%) patients suffered from congestive heart failure and arrhythmias.
** 4 (3.8%) patients, who underwent surgery and had trauma (excluding patients who underwent surgery or trauma during last 4 weeks).