Table 1.
Sociodemographic characteristics of singleton birth mothers by ART status, Australia, 2007–2009
| Non-ART | ART | P | |||
|---|---|---|---|---|---|
| (N = 381,345) | (N = 12,105) | ||||
| No. | % | No. | % | ||
| Maternal age (years) | |||||
| Mean ± SD | 29.7 ± 5.7 | 34.0 ± 4.8 | <0.01 | ||
| Less than 24 | 76,182 | 20.0 | 267 | 2.2 | <0.01 |
| 25–34 | 223,494 | 58.6 | 6,131 | 50.7 | |
| 35–44 | 81,216 | 21.3 | 5,535 | 45.7 | |
| 45 and over | 439 | 0.1 | 172 | 1.4 | |
| Maternal country of birth | |||||
| Australia | 294,196 | 77.6 | 9,671 | 80.2 | <0.01 |
| Overseas | 85,083 | 22.4 | 2,389 | 19.8 | |
| BMI (kg/m 2 ) (a) | |||||
| Less than 18.5 | 4,749 | 4.3 | 163 | 3.9 | <0.01 |
| 18.5–24.9 | 49,913 | 45.6 | 2,079 | 49.7 | |
| 25.0–29.9 | 30,819 | 28.2 | 1,086 | 26.0 | |
| 30.0–34.9 | 14,336 | 13.1 | 492 | 11.8 | |
| 35.0–39.9 | 6,199 | 5.7 | 223 | 5.3 | |
| 40.0 and over | 3,470 | 3.2 | 140 | 3.4 | |
| SEIFA Index of Disadvantage | |||||
| 1 (Most disadvantaged) | 78,473 | 20.7 | 1,498 | 12.4 | <0.01 |
| 2 | 62,969 | 16.6 | 1,528 | 12.7 | |
| 3 | 83,153 | 22.0 | 2,620 | 21.7 | |
| 4 | 87,116 | 23.0 | 3,093 | 25.7 | |
| 5 (Least disadvantaged) | 66,987 | 17.7 | 3,320 | 27.5 | |
| Remoteness | |||||
| Major cities | 244,632 | 64.2 | 8,778 | 72.6 | <0.01 |
| Inner regional | 80,205 | 21.1 | 2,113 | 17.5 | |
| Outer regional | 44,867 | 11.8 | 1,009 | 8.3 | |
| Remote | 7,082 | 1.9 | 155 | 1.3 | |
| Very remote | 4,252 | 1.1 | 41 | 0.3 | |
| Other(b) | 307 | 9 | |||
| Smoking status during pregnancy (c) | |||||
| Yes | 47,179 | 19.4 | 321 | 3.8 | <0.01 |
| No | 196,661 | 80.7 | 8,181 | 96.2 | |
| Parity | |||||
| Primiparous | 154,519 | 40.5 | 7,549 | 62.4 | <0.01 |
| Multiparous | 226,826 | 59.5 | 4,556 | 37.6 | |
| Health insurance | |||||
| Public | 256,511 | 67.6 | 3,274 | 27.1 | <0.01 |
| Private | 122,987 | 32.4 | 8,812 | 72.9 | |
| Other (d) | 1,847 | 19 | |||
(a) Maternal pre-pregnancy body mass index (BMI) was available in only one jurisdiction between 2008 and 2009 (N = 119,257), accounting for 30.3% of the study population.
(b) Includes 289 non-Australian residents and 27 not stated cases.
(c) Smoking during pregnancy was indicated in two jurisdictions between 2007 and 2009, and one jurisdiction between 2008 and 2009 (N = 253,444), accounting for 64.42% of the study population.
(d) Includes 1,124 not applicable and 742 not stated cases.