Table 3 |
|||||
| Adjusted odds ratio for factors associated with non-registration, New South Wales, Australia, 2001–2005 (n = 398,730*) | |||||
| Factors | Values | n | Adjusted OR | 95% CI | |
| Indigenous status* | Indigenous | 12,626 | 3.26 | 3.10 | 3.43 |
| Non-Indigenous | 386,104 | 1 | |||
| Maternal age* | 25–39 | 311,542 | 1.00 | ||
| <25 or >39 | 87,188 | 2.81 | 2.72 | 2.90 | |
| Birthweight (grams)* | ≥2500g | 375,296 | 1 | ||
| <2500g | 23,434 | 1.79 | 1.69 | 1.90 | |
| Plurality | Single | 385,990 | 1 | ||
| Plural | 12,740 | 0.84 | 0.76 | 0.92 | |
| Quarters*b | First | 103,861 | 1 | ||
| Second | 104,183 | 1.08 | 1.03 | 1.12 | |
| Third | 108,516 | 1.30 | 1.24 | 1.35 | |
| Fourth | 82,170 | 1.56 | 1.49 | 1.64 | |
| Number of previous pregnancies* | 0 | 167,942 | 1 | ||
| 1 | 134,661 | 1.85 | 1.78 | 1.93 | |
| 2 | 60,543 | 3.06 | 2.92 | 3.20 | |
| 3 | 21,751 | 4.71 | 4.46 | 4.98 | |
| 4+ | 13,833 | 7.29 | 6.87 | 7.73 | |
| Remoteness* | Major cities | 300,897 | 1 | ||
| Other areas | 97,833 | 1.57 | 1.52 | 1.63 | |
| Mother’s country of birth* | Australia | 285,335 | 1 | ||
| Other countries | 113,395 | 0.72 | 0.69 | 0.75 | |
| Neonatal or postneonatal death | No | 397,663 | 1 | ||
| Yes | 1,067 | 3.84 | 3.23 | 4.57 | |
| Year of birth | 2001 | 80,050 | 1 | ||
| 2002 | 82,985 | 8.96 | 7.98 | 10.06 | |
| 2003 | 84,932 | 16.08 | 14.36 | 18.00 | |
| 2004 | 84,039 | 17.39 | 15.54 | 19.47 | |
| 2005 | 66,724 | 25.14 | 22.44 | 28.16 | |
*Significantly different.
b The data from October to December 2005 were excluded because of the interval between birth and registration.
Xu et al. BMC Pregnancy and Childbirth 2012 12:147 doi:10.1186/1471-2393-12-147
