Table 3 Crude and Adjusted Odds Ratios and 95% Confidence Intervals of predictors of tobacco exposure among pregnant women in Ibadan, Nigeria

Age

 Less than 35

1

 35 and above

0.898 (0.63–1.29)

0.543

Education

 Primary or less

1

 Secondary

1.073 (0.25–4.70)

0.926

 Tertiary or higher

0.798 (0.19–3.40)

0.760

Religion

 Christianity

1

 Islam

1.237 (0.75–2.04)

0.404

Marital status

 Single

1

 Ever married

0.59 (0.25–1.39)

0.225

Monthly income in naira)

 Less than 20,000

1

 20,000-99,999

0.80 (0.46–1.37)

0.410

 100,000 and above

1.08 (0.41–2.90)

0.873

Household wealth

 Poorest

1

 Middle

0.96 (0.51–1.78)

0.887

 Richest

1.10 (0.60–2.01)

0.754

Parity

 Nullipara

1

 1–3

1.13 (0.67–1.90)

0.641

 4 and above

1.24 (0.42–3.64)

0.694

BMI

 Not obese

1

 Obese

1.41 (0.79–2.52)

0.245

History of stillbirth

 No

1

 Yes

1.39 (0.66–2.91)

0.389

History of induced abortion

 No

1

1

 Yes

2.57 (1.44–4.59)

0.001

1.72 (0.90–3.27)

0.099

History of miscarriage

 No

1

 Yes

0.96 (0.52–1.77)

0.885

Alcohol consumption

 No

1

1

 Yes

2.60 (1.47–4.62)

0.001

1.58 (0.77–3.25)

0.215

Pre-pregnancy tobacco use

 No

1

1

 Yes

11.26 (5.00–25.37)

< 0.001

12.95 (4.93–34.03)

< 0.001

Grand-multigravida

 No

1

 Yes

1.34 (0.65–2.76)

0.425