Table 1.
The comparison of participants’ baseline demographic and risk factors between two groups
| Variable | Total n(%) | First DVT n(%) | Recurrent DVT n(%) | P value |
|---|---|---|---|---|
| n | 385(100) | 337(87.5) | 48(12.5) | |
| Age (years)* | 48.30 ± 19.16 | 48.79 ± 19.26 | 44.83 ± 18.28 | 0.180† |
| Sex (men) | 228(59.2) | 200(59.3) | 137(40.7) | 0.894†† |
| Family history | 5(1.3) | 4(1.2) | 1(2.1) | 0.488††† |
| Coagulopathy | 12(3.1) | 8(2.4) | 4(8.3) | <0.050†† |
| Immobilization | 102(26.5) | 96(28.5) | 6(12.5) | 0.019†† |
| smoking | 99(25.7) | 88(26.1) | 11(22.9) | 0.635†† |
| surgery | 53(13.8) | 48(14.2) | 5(10.4) | 0.472†† |
| Pelvic | 9(2.3) | 9(2.7) | 0 | 0.837†† |
| Knee | 2(0.5) | 2(0.6) | 0 | |
| Others | 42(10.9) | 37(11.0) | 5(10.4) | |
| Obesity | 7(1.8) | 6(1.8) | 1(2.1) | 1.000††† |
| Cancer | 20(5.2) | 18(5.3) | 2(4.2) | 1.000††† |
| Contraceptive | 38(9.9) | 36(10.7) | 2(4.2) | 0.200††† |
| HRT | 3(0.8) | 3(0.9) | 0 | 1.000††† |
| CVD treatment | 17(4.4) | 15(4.5) | 2(4.2) | 0.643 |
| IV drug abuse | 32(8.3) | 29(8.6) | 3(6.3) | 0.782†† |
| Pregnancy | 8(2.1) | 6(1.8) | 2(4.2) | 0.262†† |
DVT: Deep vein thrombosis; HRT: Hormone replacement therapy
*
Mean ± Standard Deviation
†
Student's t-test†
† †
Chi-square;
†††
Fisher's exact test