Table 1

Under-reporting of birth registrations for live births in four years after birth, New South Wales, Australia, 2001–2005
Year of birth n Year of birth 1st year after birth 2nd year after birth 3rd year after birth 4th year after birth Non- registered
n % n % n % n % n % n %
Non- risk group* 2001 44,146 37,117 84.08 4,832 10.95 279 0.63 176 0.40 157 0.36 1,585 3.59
2002 44,803 38,440 85.8 4,520 10.09 312 0.70 149 0.33 1,382 3.08
2003 45,579 39,256 86.13 4,445 9.75 267 0.59 1,611 3.53
2004 45,347 39,364 86.81 4,310 9.5 1,673 3.69
2005 48,358 41,699 86.23 6,659 13.77
Total 228,233 195,876 85.82 18,107 10.07 858 0.64 325 0.37 157 0.36 12,910 5.66
Risk group** 2001 40,324 31,562 78.27 4,707 11.67 368 0.91 313 0.78 285 0.71 3,089 7.66
2002 39,806 31,592 79.36 4,396 11.04 449 1.13 283 0.71 3,086 7.75
2003 39,421 31,286 79.36 4,271 10.83 424 1.08 3,440 8.73
2004 38,748 30,946 79.86 4,113 10.61 3,689 9.52
2005 40,541 31,738 78.29 8,803 21.71
Total 198,840 157,124 79.02 17,487 8.79 1241 0.62 596 0.30 285 0.14 22,107 11.12
Overall 2001 84,470 68,679 81.31 9,539 11.29 647 0.77 489 0.58 442 0.52 4,674 5.53
2002 84,609 70,032 82.77 8,916 10.54 761 0.90 432 0.51 4,468 5.28
2003 85,000 70,542 82.99 8,716 10.25 691 0.81 5,051 5.94
2004 84,095 70,310 83.61 8,423 10.02 5,362 6.38
2005 88,899 73,437 82.61 15,462 17.39
Total 427,073 353,000 82.66 35,594 10.53 2,099 0.83 921 0.54 442 0.52 35,017 8.20

*Non-risk group: non-Indigenous, maternal age 25–39, gestational age 37–41 weeks, no neonatal or postneonatal death, birthweight ≥2,500 grams and living in major cities.

**Risk group has one or more conditions: Indigenous, maternal age <25 or >39, gestational age <37 or >41 weeks, neonatal or postneonatal death, low birthweight (<2,500 grams), not living in major cities.

Missing cases: 61 records which did not state the above conditions are excluded from the analysis.

Xu et al.

Xu et al. BMC Pregnancy and Childbirth 2012 12:147   doi:10.1186/1471-2393-12-147

Open Data