Table 4 Associations between characteristics and exclusive breastfeeding at time of survey completion

Age of woman (years)

.004^c

.72

 18-25^b

33 (40.7%)

1.0

1.0

 26–35

222 (61.0%)

2.27 (1.39, 3.71)

1.19 (0.62, 2.29)

 36 + 

49 (53.9%)

1.70 (0.93, 3.11)

0.98 (0.42, 2.25)

Age of infant (months)

.046^c

.11

 2 months^b

62 (60.2%)

1.0

1.0

 3 months

128 (60.1%)

1.00 (0.62, 1.61)

1.24 (0.70, 2.20)

 4 months

108 (54.3%)

0.78 (0.48, 1.27)

0.84 (0.47, 1.51)

 5 months

6 (28.6%)

0.26 (0.09, 0.74)

0.36 (0.11, 1.15)

Aboriginal or Torres Strait Islander, or both

.19

.51

 Yes

12 (44.4%)

0.59 (0.27, 1.30)

1.37 (0.54, 3.51)

 No^b

292 (57.4%)

1.0

1.0

Marital status

.027^c

.90

 Never married

16 (37.2%)

0.42 (0.22, 0.80)

0.95 (0.40, 2.29)

 Separated or divorced

5 (50.0%)

0.71 (0.20, 2.47)

1.38 (0.32, 5.87)

 Married or de facto^b

283 (58.6%)

1.0

1.0

Education

 < .001^c

.002^c

 Completed high school or less

51 (41.8%)

0.28 (0.18, 0.44)

0.40 (0.22, 0.72)

 Completed TAFE Certificate or Diploma

82 (46.6%)

0.34 (0.23, 0.51)

0.46 (0.28, 0.76)

 Completed University, CAE, Degree or higher^b

171 (71.9%)

1.0

1.0

Disadvantage

.020^c

.053

 Most disadvantaged

150 (52.1%)

0.66 (0.47, 0.94)

0.66 (0.43, 1.00)

 Least disadvantaged^b

154 (62.1%)

1.0

1.0

Pre-Pregnancy BMI

(N = 280)

 < .001^c

 < .001^c

 Underweight (< 18.5 kg/m²)

10 (71.4%)

1.11 (0.34, 3.65)

1.34 (0.35, 5.16)

 Healthy weight^b (18.5–24.9 kg/m²)

158 (69.3%)

1.0

1.0

 Overweight (25.0–29.9 kg/m²)

59 (53.2%)

0.50 (0.32, 0.80)

0.50 (0.30, 0.86)

 Obese (≥ 30.0 kg/m²)

53 (40.5%)

0.30 (0.19, 0.47)

0.30 (0.18, 0.50)

Pregnancy

.86

.77

 First pregnancy

107 (57.2%)

1.03 (0.72, 1.48)

0.93 (0.58, 1.49)

 Subsequent pregnancy^b

197 (56.5%)

1.0

1.0

Type of birth

.17

.73

 Vaginal

221 (58.6%)

1.30 (0.89, 1.88)

1.08 (0.69, 1.70)

 Caesarean^b

83 (52.2%)

1.0

1.0

Pre-eclampsia

.10

.67

 No

301 (57.2%)

3.12 (0.80, 12.20)

1.41 (0.30, 6.57)

 Yes^b

3 (30.0%)

1.0

1.0

Gestational Diabetes

.62

.53

 No^b

274 (57.1%)

1.0

1.0

 Yes

30 (53.6%)

0.87 (0.50, 1.51)

1.24 (0.63, 2.47)

Pregnancy risk level

(N = 303)

 < .001^c

.10

 Low risk

229 (62.1%)

1.99 (1.37, 2.89)

1.46 (0.92, 3.32)

 High risk^b

74 (45.1%)

1.0

1.0

Smoked tobacco at time of survey

 < .001^c

 < .001^c

 No^a

301 (60.0%)

1.0

1.0

 Yes

3 (8.8%)

0.06 (0.02, 0.21)

0.09 (0.02, 0.33)

Alcohol consumption at time of survey

.003^c

.06

 No risk of harm (score = 0)^a

141 (61.8%)

1.0

1.0

 Low risk of harm (score = 1–2)

119 (57.8%)

0.84 (0.57, 1.24)

0.79 (0.50, 1.25)

 Medium risk of harm (score = 3–4)

41 (50.0%)

0.62 (0.37, 1.03)

0.49 (0.27, 0.89)

High risk of harm (score = 5 +)

3 (15.0%)

0.11 (0.03, 0.38)

0.29 (0.07, 1.26)