Table 2 Risk factors predisposing to VTE in puerperium of women age ≥ 35
Risk factors | VTE(%) (n = 30) | Non-VTE(%) (n = 12,421) | χ2 value | P value |
|---|---|---|---|---|
Previous obstetric history | ||||
0 | 11 (36.67) | 2938 (23.65) | 2.804 | .094 |
≥ 1 | 19 (63.33) | 9483 (76.35) | ||
Parity | ||||
1 | 30 (100.00) | 12,048 (97.00) | 1.000a | |
≥ 2 | 0 (0.00) | 373 (3.00) | ||
Fetal position of singleton cases | ||||
Head | 28 (93.33) | 11,406 (94.67) | .385a | |
Breech | 1 (3.33) | 506 (4.20) | ||
Transverse | 1 (3.33) | 136 (1.13) | ||
Mode of delivery | ||||
Vaginal delivery | 2 (6.67) | 4786 (38.53) | 25.792 | <.001 |
Emergency cesarean section | 16 (53.33) | 2399 (19.31) | ||
Elective caesarean section | 12 (40.00) | 5236 (42.15) | ||
In vitro fertilization (IVF) | 0 (0.00) | 678 (5.46) | 0.834 | .361 |
Scared uterus | 20 (66.67) | 5612 (45.18) | 5.58 | .018 |
Relative cephalopelvic disproportion | 0 (0.00) | 164 (1.32) | 1.000a | |
Placenta previa | 3 (10.00) | 612 (4.93) | 0.738 | .390 |
Adherent placenta | 4 (13.33) | 610 (4.91) | 2.910 | .088 |
Fetal growth restriction | 0 (0.00) | 182 (1.47) | 1.000a | |
Premature birth | 5 (16.67) | 1557 (12.54) | 0.165 | .684 |
Macrosomia (birthweight≥4000 g) | 1 (3.33) | 789 (6.35) | 0.092 | .762 |
Premature rupture of membranes | 7 (23.33) | 2184 (17.58) | 0.682 | .409 |
Fetal distress | 5 (16.67) | 1566 (12.61) | 0.155 | .694 |
Intrauterine infection | 1 (3.33) | 139 (1.12) | .288a | |
Postpartum hemorrhage | 3 (10.00) | 458 (3.69) | 1.809 | .179 |
Anemia | 9 (30.00) | 2654 (21.37) | 1.327 | .249 |
Intrahepatic cholestasis of pregnancy | 3 (10.00) | 398 (3.20) | .071a | |
Gestational diabetes mellitus | 3 (10.00) | 2951 (23.76) | 3.130 | .077 |
Hypertensive disorders of pregnancy | 3 (10.00) | 924 (7.44) | 0.034 | .853 |
Cardiac insufficiency | 0 (0.00) | 20 (0.16) | 1.000a | |
Uterine rupture | 0 (0.00) | 84 (0.68) | 1.000a | |
D-dimer≥5.545 mg /L | 21 (70.00) | 3057 (24.61) | 33.130 | <.001 |
D-dimer≥6.475 mg /L | 16 (53.33) | 2480 (19.97) | 20.789 | <.001 |
D-dimer≥9.88 mg /L | 11 (36.67) | 1242 (10.00) | 20.661 | <.001 |