Table 2.
Crude and adjusted risk factors for antepartum stillbirth in New South Wales Australia 2002 – 2006
| Antepartum still births (ante=1) | Births | Univariable hazard ratio | 95% confidence interval | Multivariable hazard ratio | 95% confidence interval | ||
|---|---|---|---|---|---|---|---|
| Indigenous |
|
|
|
|
|
|
|
| |
Aboriginal or Torres Strait Islander |
35 |
8121 |
1.31 |
0.94, 1.84 |
1.09 |
0.77, 1.55 |
| |
Not ATSI |
1092 |
319569 |
|
|
|
|
| Maternal age (years) |
|
|
|
|
|
|
|
| |
< 20 |
66 |
15221 |
1.31 |
0.98, 1.74 |
1.18 |
0.88, 1.57 |
| |
20 -24 |
161 |
48302 |
Referent |
Referent |
|
|
| |
25-29 |
304 |
92003 |
1.00 |
0.83, 1.21 |
1.14 |
0.94, 1.34 |
| |
30-34 |
343 |
107730 |
0.98 |
0.81, 1.18 |
1.21 |
1.00, 1.47 |
| |
35-39 |
184 |
52748 |
1.09 |
0.88, 1.35 |
1.40 |
1.12, 1.75 |
| |
≥ 40 |
69 |
11686 |
1.90 |
1.43, 2.52 |
2.41 |
1.80, 3.23 |
| Parity |
|
|
|
|
|
|
|
| |
Multiparous |
502 |
154473 |
Referent |
|
|
|
| |
Nulliparous |
625 |
173217 |
1.07 |
0.96, 1.21 |
1.23 |
1.08, 1.40 |
| Preexisting diabetes |
|
|
|
|
|
|
|
| |
No |
1110 |
325801 |
Referent |
|
|
|
| |
Yes |
17 |
1889 |
3.11 |
1.93, 5.03 |
2.65 |
1.63, 4.32 |
| Preexisting hypertension |
|
|
|
|
|
|
|
| |
No |
1095 |
324194 |
Referent |
|
|
|
| |
Yes |
32 |
3496 |
3.03 |
2.13, 4.31 |
2.77 |
1.94, 3.97 |
| Smoking during pregnancy |
|
|
|
|
|
|
|
| |
No |
877 |
279191 |
Referent |
|
|
|
| |
Yes |
250 |
48499 |
1.68 |
1.46, 1.93 |
1.82 |
1.56, 2.12 |
| Baby gender |
|
|
|
|
|
|
|
| |
Female |
547 |
158448 |
Referent |
|
|
|
| |
Male |
580 |
169242 |
1.00 |
0.89, 1.12 |
1.00 |
0.89, 1.12 |
| Gestational diabetes |
|
|
|
|
|
|
|
| |
No |
1088 |
312475 |
Referent |
|
|
|
| |
Yes |
39 |
15215 |
0.80 |
0.58, 1.10 |
0.65 |
0.47, 0.91 |
| Pre-eclampsia |
|
|
|
|
|
|
|
| |
No |
1057 |
308508 |
Referent |
|
|
|
| |
Yes |
70 |
19182 |
1.18 |
0.93, 1.50 |
1.13 |
0.88, 1.44 |
| Area health service of residence |
|
|
|
|
|
|
|
| |
Sydney South West AHS |
291 |
74122 |
1.26 |
1.05, 1.53 |
1.23 |
1.01, 1.49 |
| |
South Eastern Sydney & Illawarra AHS |
169 |
54949 |
Referent |
|
|
|
| |
Sydney West AHS |
239 |
62504 |
1.23 |
1.01, 1.50 |
1.17 |
0.96, 1.43 |
| |
Northern Sydney & Central Coast AHS |
127 |
51340 |
0.80 |
0.64, 1.01 |
0.81 |
0.65, 1.02 |
| |
Hunter & New England AHS |
139 |
37629 |
1.19 |
0.95, 1.49 |
1.16 |
0.92, 1.46 |
| |
North Coast AHS |
58 |
18194 |
1.02 |
0.76, 1.38 |
0.99 |
0.73, 1.34 |
| |
Greater Southern AHS |
43 |
14816 |
0.93 |
0.67, 1.30 |
0.90 |
0.65, 1.37 |
| |
Greater Western AHS |
61 |
14136 |
1.40 |
1.04, 1.87 |
1.33 |
0.99,1.80 |
| Mother’s Country of birth |
|
|
|
|
|
|
|
| |
English speaking |
847 |
255602 |
Referent |
|
|
|
| |
Central and South America |
8 |
2862 |
0.85 |
0.42, 1.71 |
0.90 |
0.45, 1.81 |
| |
Eastern Europe, Russia, Central Asian and Baltic States |
12 |
2136 |
1.68 |
0.95, 2.97 |
1.84 |
1.04, 3.25 |
| |
Melanesia, Micronesia and Polynesia |
32 |
5801 |
1.67 |
1.17, 2.38 |
1.70 |
1.19, 2.44 |
| |
Middle East and Africa |
82 |
14768 |
1.64 |
1.31, 2.06 |
1.74 |
1.38, 2.21 |
| |
North East Asia |
27 |
12637 |
0.65 |
1.44, 0.96 |
0.72 |
0.49, 1.06 |
| |
South East Asia |
58 |
18592 |
0.98 |
0.75, 1.28 |
1.05 |
0.80, 1.38 |
| |
Southern Asia |
44 |
8802 |
1.53 |
1.13, 2.07 |
1.75 |
1.28, 2.39 |
| |
Southern Europe |
14 |
3836 |
1.10 |
0.65, 1.87 |
1.10 |
0.65, 1.87 |
| Western and Northern Europe | 3 | 2654 | 0.34 | 0.11, 1.04 | 0.35 | 0.11, 1.10 |