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Table 3 Socio-demographic determinants of smoking cessation and heavy smoking during pregnancy: percentage of quit, % of heavy smokers and adjusted odds ratios (AOR) from multiple logistic regression analysis

From: Socio-demographic factors associated with smoking and smoking cessation among 426,344 pregnant women in New South Wales, Australia

Socio-demographic characteristics

Total number of smokers

% of smokers quit smoking (n = 2,920)

ΨAdjusted odds ratio (95% CI)

% of heavy smokers

ΨAdjusted odds ratio (95% CI)

Year of delivery#

     

1999–2003

69500

4.0

 

49.6

 

1999

16302

4.5

1.00

52.2

1.00

2000

15000

4.1

0.92 (0.83–1.04)

49.7

0.90 (0.86–0.94)*

2001

14422

4.0

0.92 (0.82–1.03)

49.6

0.89 (0.85–0.93)*

2002

13820

4.0

0.94 (0.83–1.05)

48.9

0.85 (0.81–0.89)*

2003

12875

3.3

0.77 (0.68–0.87)*

46.8

0.78 (0.76–0.82)*

Maternal age (years)#

     

Under 20 years

8063

3.9

0.84 (0.71–0.99)*

45.4

1.00

20–34

55625

4.1

1.11 (0.98–1.26)

49.6

1.01 (0.95–1.06)

35+

8705

3.6

1.00

53.0

1.18 (1.10–1.27)*

Aboriginal status#

     

Non Aboriginal

66287

4.3

1.86 (1.51–2.30)*

48.7

1.00

Aboriginal

6112

1.6

1.00

58.6

1.24 (1.17–1.31)*

Parity#

     

Primiparous

25407

6.8

2.55 (2.34–2.77)*

40.2

1.00

Multiparous

47007

2.6

1.00

54.4

1.68 (1.62–1.73)*

Country of birth#

     

Australian born

63519

4.0

1.00

50.7

1.00

NZ and Oceania

3374

3.4

0.94 (0.77–1.14)

41.3

0.61 (0.57–0.66)*

UK & Ireland

1488

4.7

0.90 (0.70–1.16)

47.6

0.94 (0.84–1.04)

Other Europe

1129

4.1

0.83 (0.61–1.12)

40.4

0.68 (0.60–0.78)*

Middle East

1406

2.8

0.87 (0.63–1.21)

41.3

0.56 (0.51–0.64)*

Asia

822

10.9

2.71 (2.15–3.43)*

28.1

0.37 (0.31 – 0.44)*

America/Africa

380

7.4

1.38 (0.91–2.1)

35

0.56 (0.44–0.69)*

Others

258

5.6

1.00(0.57–1.76)

45.9

0.89 (0.69–1.17)

SES#

     

Lowest SES

37289

3.1

1.00

52.7

1.84 (1.72–1.96)*

Moderate SES

28485

3.8

1.11 (1.02–1.21)*

48.0

1.58 (1.48–1.68)*

Highest SES

5797

10.2

2.79 (2.51–3.10)*

35.8

1.00

Booking in#: Booked

68710

4.2

1.83 (1.33–2.53)*

48.9

1.00

Unbooked

3710

1.3

1.00

62.0

1.20 (1.10–1.31)*

Weeks at 1st antenatal visit#

     

0–12 weeks

35263

5.0

2.33 (1.91–2.85)*

46.7

1.00

13–26 weeks

29084

3.6

1.75 (1.42–2.14)*

50.1

1.17 (1.13–1.21)*

27 weeks +

6453

1.7

1.00

58.3

1.55 (1.47–1.66)*

Any obstetric condition#: No

67272

3.9

1.00

48.9

1.00

Yes

5148

5.4

1.19 (1.04–1.35)*

62.0

1.20 (1.10–1.31)*

  1. #Statistically significant (p < 0.05) in bivariate analyses; * ORs significant at p < 0.05 level; The fitted multiple logistic regression model is significant at p < 0.001; The model predicted overall 95.9% correctly classified (considering cut point 0.50). For all variables not stated and missing cases excluded from the analyses.
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BMC Public Health

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