Table 1 Maternal characteristics of women who gave birth to twins, Australia, 2001-2010
From: Australian national birthweight percentiles by sex and gestational age for twins, 2001–2010
Maternal characteristics | Number & percentage |
|---|---|
Total | 43,833 (100.0 %) |
Maternal age (years) | |
< 20 | 873 (2.0 %) |
20-24 | 4076 (9.3 %) |
25-29 | 10,468 (23.9 %) |
30-34 | 15,944 (36.4 %) |
35-39 | 10,412 (23.8 %) |
> =40 | 2055 (4.7 %) |
Not stated | 5 (0.0 %) |
Parity | |
Primiparas | 17,971 (43.3 %) |
Multiparas | 23,466 (56.6 %) |
Not stated | 37 (0.1 %) |
Country of birth | |
Australia | 31,682 (72.3 %) |
Overseas | 11,944 (27.2 %) |
Not stated | 207 (0.5 %) |
Smoking during pregnancy | |
Yes | 4271 (13.9 %) |
No | 25,968 (84.7 %) |
Not stated | 420 (1.4 %) |
Remoteness | |
Major Cities | 30,579 (69.8 %) |
Inner Regional | 8136 (18.6 %) |
Outer Regional | 3959 (9.0 %) |
Remote | 738 (1.7 %) |
Very remote | 367 (0.8 %) |
Not stated | 17 (0.0 %) |