Socio-demographic characteristics | Total number of women (%) | % of smokers (n = 72,428) | ΨAdjusted odds ratio (95% CI) |
---|---|---|---|
Year of delivery# | Â | Â | Â |
1999–2003 | 426344 (100.0) | 17.0 |  |
1999 | 85655 (20.2) | 19.0 | 1.00 |
2000 | 86439 (20.3) | 17.4 | 0.91 (0.88–0.93)* |
2001 | 84362 (19.8) | 17.1 | 0.87 (0.85–0.89)* |
2002 | 84573 (19.8) | 16.4 | 0.83 (0.81–0.85)* |
2003 | 85015 (19.9) | 15.1 | 0.77 (0.75–0.79)* |
Maternal age (years)# | Â | Â | Â |
Under 20 years | 18778 (4.4) | 42.9 | 3.73 (3.58–3.89)* |
20–34 | 329834(77.4) | 16.9 | 1.31 (1.27–1.34)* |
35+ | 77553(18.2) | 11.2 | 1.00 |
Aboriginal status# | Â | Â | Â |
Non Aboriginal | 415583(97.5) | 16.0 | 1.00 |
Aboriginal | 10579 (2.5) | 57.8 | 3.43 (3.29–3.58)* |
Parity# | Â | Â | Â |
Primiparous | 177304 (41.6) | 14.3 | 1.00 |
Multiparous | 248991 (58.4) | 18.9 | 1.49 (1.46–1.51)* |
Country of birth# | Â | Â | Â |
Australian born | 309580 (72.7) | 20.5 | 1.00 |
NZ and Oceania | 17809(4.2) | 18.9 | 0.75 (0.72–0.78)* |
UK & Ireland | 12866 (3.0) | 11.6 | 0.77 (0.73–0.82)* |
Other Europe | 11195 (2.6) | 10.1 | 0.51 (0.47–0.54)* |
Middle East | 16864 (4.0) | 8.3 | 0.25 (0.24–0.27)* |
Asia | 46721 (11.0) | 1.8 | 0.066 (0.06–0.07)* |
America/Africa | 7313 (1.7) | 5.2 | 0.24 (0.22–0.26)* |
Others | 3680 (0.9) | 7.0 | 0.44 (0.39–0.50)* |
Socio-economic status (SES)# | Â | Â | Â |
Lowest SES | 166987 (39.5) | 22.3 | 3.33 (3.23–3.43)* |
Moderate SES | 168661 (39.9) | 16.9 | 2.40 (2.32–2.47)* |
Highest SES | 87404 (20.7) | 6.6 | 1.00 |
Booking in# | Â | Â | Â |
Booked | 416223 (97.6) | 16.5 | 1.00 |
Unbooked | 10120(2.4) | 36.7 | 1.52 (1.44–1.61)* |
Weeks at 1st antenatal visit# | Â | Â | Â |
0–12 weeks | 245729 (58.2) | 14.4 | 1.00 |
13–26 weeks | 156396 (37.0) | 18.6 | 1.45 (1.42–1.47)* |
27 weeks + | 20314(4.8) | 31.8 | 2.68 (2.58–2.77)* |