|
Maternal age (y) mean ± SD
|
29.7 ± 6.1
|
30.5 ± 6.1
|
0.01
|
|
≥30
|
445 (47.4)
|
212 (51.8)
|
0.14
|
|
Parity ≥1
|
560 (59.7)
|
208 (50.9)
|
0.003
|
|
Previous cesarean section
|
95 (10.1)
|
18 (4.4)
|
0.0005
|
|
Estimated fetal weight
|
|
First twin (g) mean ± SD
|
2245 ± 430
|
2284 ± 420
|
0.12
|
|
Second twin (g) mean ± SD
|
2225 ± 422
|
2291 ± 432
|
0.008
|
|
Mode of delivery
|
|
Vaginal for both
|
0
|
240 (58.7)
| |
|
Cesarean for both
|
938 (100.00)
|
155 (37.9)
|
< 0.0001
|
|
Vaginal/cesarean
|
0
|
14 (3.4)
| |
|
Presentation at delivery
|
|
Cephalic/Cephalic
|
503 (53.6)
|
276 (67.5)
| |
|
Cephalic/Non-cephalic
|
376 (40.1)
|
131 (32.0)
|
< 0.0001
|
|
First twin in non-cephalic
|
58 (6.2)
|
2 (0.5)
| |
|
Gestational age at delivery (wk)
|
|
Mean ± SD
|
37.01 ± 1.35
|
37.51 ± 1.17
|
< 0.0001
|
|
32 wk. 0 days to 33 wk. 6 days
|
30 (3.2)
|
3 (0.7)
| |
|
34 wk. 0 days to 36 wk. 6 days
|
328 (35.0)
|
115 (28.1)
| |
|
37 wk. 0 days to 38 wk. 6 days
|
560 (59.7)
|
270 (66.0)
|
< 0.0001
|
|
≥ 39 wk. 0 days
|
20 (2.1)
|
21 (5.1)
| |
|
Interval between deliveries (min) Mean ± SD
|
2.2 ± 3.2
|
12.2 ± 21.2
|
< 0.0001
|
|
Use of antenatal corticosteroids
|
274 (29.2)
|
78 (19.1)
|
< 0.0001
|
|
Chorionicity at birth
|
|
Dichorionic- diamnionic
|
699 (74.5)
|
304 (74.3)
|
0.91
|
|
Monochorionic-diamnionic
|
214 (22.8)
|
92 (22.5)
| |
|
Monochorionic-monoamniotic
|
1 (0.1)
|
1 (0.2)
| |
|
Undocumented
|
24 (2.6)
|
12 (2.9)
| |
