Table 2 Characteristics of mothers and newborns, by fetal presentation of the second twin
Non-vertex n/N, (%) N = 369 | Vertex n/N, (%) 1,055 | Adjusted chi square P valuea | |
|---|---|---|---|
Age (years) | |||
<20 | 23/369 (6.2) | 65/1053 (6.2) | 0.247 |
20-35 | 305/369 (82.7) | 901/1053 (85.6) | |
>35 | 41/369 (11.1) | 87/1053 (8.3) | |
Marital status | |||
Married | 337/367 (91.8) | 967/1053 (91.8) | 0.997 |
Not married | 30/367 (8.2) | 86/1053 (8.2) | |
Maternal education (years) | |||
Nil | 63/348 (18.1) | 139/999 (13.9) | 0.244 |
1 – 4 | 17/348 (4.9) | 64/999 (6.4) | |
5 – 9 | 140/348 (40.2) | 430/999 (43.0) | |
> = 10 | 128/348 (36.8) | 366/999 (36.6) | |
Parity | |||
Nil | 103/368 (28.0) | 270/1052 (25.7) | 0.559 |
1 or 2 | 164/368 (44.6) | 498/1052 (47.3) | |
> = 3 | 101/368 (27.4) | 284/1052 (27.0) | |
Caesarean delivery at last pregnancy | |||
Yes | 7/329 (2.1) | 14/941 (1.5) | 0.434 |
No | 322/329 (97.7) | 927/941 (98.5) | |
Antenatal care | |||
Nil | 25/344 (7.3) | 76/983 (7.7) | 0.850 |
1 to 3 | 107/344 (31.1) | 319/983 (32.5) | |
> = 4 | 212/344 (61.6) | 588/983 (59.8) | |
Labour | |||
Spontaneous | 341/369 (92.4) | 961/1055 (91.1) | 0.691 |
Induced | 25/369 (6.8) | 87/1055 (8.2) | |
No labour | 3/369 (0.8) | 7/1055 (0.7) | |
Mode of delivery | |||
Vaginal delivery | 346/369 (93.8) | 1045/1055 (99.1) | <0.001 |
Caesarean section | 23/369 (6.2) | 10/1055 (0.9) | |
Birth attendance at delivery | |||
Doctor | 163/369 (44.2) | 427/1055 (40.5) | 0.054 |
Midwife/Nurse | 198/369 (53.7) | 568/1055 (53.8) | |
Other | 8/369 (2.2) | 60/1055 (5.7) | |
Infant sex | |||
Male | 190/369 (51.5) | 530/1055 (50.2) | 0.704 |
Female | 179/369 (48.5) | 525 (49.8) | |
Sex discordance | |||
Twins are same gender | 234/369 (63.4) | 779/1055 (73.8) | <0.001 |
Twins are different gender | 135/369 (36.6) | 276/1055 (26.2) | |
Congenital malformation | |||
Yes | 3/369 (0.8) | 6/1055 (0.6) | 0.628 |
No | 366/369 (99.2) | 1049/1055 (99.4) | |
Gestational age at delivery | |||
<37 weeks | 117/369 (31.7) | 288/1055 (27.3) | 0.110 |
> = 37 weeks | 252/369 (68.3) | 767/1055 (72.7) | |
Birthweight at delivery | |||
<2500 g | 222/367 (60.5) | 570/1054 (54.1) | 0.067 |
> = 2500 g | 145/367 (39.5) | 484/1054 (45.9) | |
Birthweight discordance | |||
Birthweight discordance <15% | 243/369 (65.9) | 753/1055 (71.4) | 0.123 |
Larger twin of a >15% birthweight discordant pair | 51/369 (13.8) | 132/1055 (12.5) | |
Smaller twin of a >15% birthweight discordant pair | 75/369 (20.3) | 170/1055 (16.1) | |