Table 1.
Characteristics of live births and stillbirths, Sydney, Australia, 1997–2012.
| Characteristics | Live Births (n = 967,694) n (%) |
Stillbirths (n = 4287) n (%) |
Total (n = 971,981) n (%) |
Chi-Square Test p-Value |
|---|---|---|---|---|
| Infant gender | 0.022 | |||
| Missing | 536 | 18 | 554 | |
| Female | 468,760 (48.5) | 1994 (46.7) | 470,754 (48.5) | |
| Male | 498,398 (51.5) | 2275 (53.3) | 500,673 (51.5) | |
| Maternal diabetes | <0.001 | |||
| No | 962,486 (99.5) | 4245 (99.0) | 966,731 (99.5) | |
| Yes | 5208 (0.5) | 42 (1.0) | 5250 (0.5) | |
| Gestational diabetes | 0.003 | |||
| No | 916,210 (94.7) | 4103 (95.7) | 920,313 (94.7) | |
| Yes | 51,484 (5.3) | 184 (4.3) | 51,668 (5.3) | |
| Maternal hypertension | <0.001 | |||
| No | 959,854 (99.2) | 4206 (98.1) | 964,060 (99.2) | |
| Yes | 7840 (0.8) | 81 (1.9) | 7921 (0.8) | |
| Maternal smoking | <0.001 | |||
| No | 863,171 (89.2) | 3566 (83.2) | 866,737 (89.2) | |
| Yes | 104,523 (10.8) | 721 (16.8) | 105,244 (10.8) | |
| Indigenous status | <0.001 | |||
| No | 957,191 (98.9) | 4209 (98.2) | 961,400 (98.9) | |
| Yes | 10,503 (1.1) | 78 (1.8) | 10,581 (1.1) | |
| Maternal country of birth | 0.575 | |||
| Australia | 40,6279 (42.0) | 1818 (42.4) | 408,097 (42.0) | |
| Other | 561,415 (58.0) | 2469 (57.6) | 563,884 (58.0) | |
| First pregnancy | <0.001 | |||
| First | 430,057 (44.4) | 2070 (48.3) | 432,127 (44.5) | |
| Multiparous | 537,637 (55.6) | 2217 (51.7) | 539,854 (55.5) | |
| Antenatal care attendance | <0.001 | |||
| No | 563,197 (58.2) | 2228 (52.0) | 565,425 (58.2) | |
| Yes | 404,497 (41.8) | 2059 (48.0) | 406,556 (41.8) | |
| Maternal age (years) | 0.004 | |||
| Missing | 252 | 1 | 253 | |
| <35 | 749,077 (77.4) | 3206 (74.8) | 752,283 (77.4) | |
| ≥35 | 218,365 (22.6) | 1080 (25.2) | 219,445 (22.6) | |
| Index of Relative Socioeconomic Disadvantage | <0.001 | |||
| Missing | 2900 | 23 | 2923 | |
| 1st quintile (most disadvantaged) | 204,908 (21.2) | 1088 (25.5) | 205,996 (21.3) | |
| 2nd quintile | 146,769 (15.2) | 741 (17.4) | 147,510 (15.2) | |
| 3rd quintile | 151,546 (15.7) | 690 (16.2) | 152,236 (15.7) | |
| 4th quintile | 154,592 (16.0) | 669 (15.7) | 155,261 (16.0) | |
| 5th quintile (least disadvantaged) | 306,979 (31.8) | 1076 (25.2) | 308,055 (31.8) |