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Table 3 Logistic Regression associations of characteristics with breastfeeding outcomes

From: Factors associated with duration of breastfeeding in women giving birth for the first time

Variable

Did you ever breastfeed this baby Yes Vs No (reference group) N = 5249

Yes = 4712 No = 537

How old was this baby when all breastfeeding stopped? > 6 months Vs < = 6 months (reference) N = 4704

> 6 m = 2739 < =6 m = 1965

How old was this baby when exclusive breastfeeding stopped? > 6 months Vs <= 6 months (reference) N = 3726

> 6 m = 1161 < =6 m = 2565

Model AUC = 0.79 (0.76–0.81), N = 5249

Model AUC = 0.71 (0.69–0.72), N = 4704

Model AUC = 0.59 (0.57–0.61), N = 3726

OR1

95% CI

P-value

OR1

95% CI

P-value

OR1

95% CI

P-value

Agev1

1.01

0.99–1.04

0.32

1.02

1.01–1.04

0.01

1.03

1.01–1.05

0.002

BMIv1

0.95

0.94–0.97

< 0.001

0.96

0.95–0.97

< 0.001

0.98

0.96–0.99

< 0.001

Gestational age at deliveryc

1.10

1.05–1.15

< 0.001

1.05

1.01–1.09

0.01

1.00

0.97–1.04

0.90

Race or Ethnicityv1

 Non-Hispanic white

Reference

Reference

Reference

 Non-Hispanic black

0.68

0.51–0.90

0.01

0.92

0.71–1.19

0.51

1.23

0.90–1.67

0.19

 Hispanic

1.40

1.02–1.92

0.04

0.72

0.59–0.88

0.002

1.13

0.89–1.44

0.31

 Other

1.30

0.87–1.95

0.20

0.86

0.69–1.09

0.21

0.99

0.77–1.28

0.94

Povertyv1

 > 200% of FPL

1.59

1.12–2.27

0.01

1.11

0.86–1.43

0.42

1.22

0.89–1.68

0.22

 100–200% of FPL

1.47

1.03–2.10

0.03

1.09

0.83–1.43

0.55

1.52

1.08–2.13

0.02

 < 100% of FPL

Reference

Reference

Reference

 Refused

0.85

0.62–1.14

0.27

0.65

0.49–0.86

0.003

0.88

0.62–1.26

0.49

Educationv1

 Master’s degree and higher

2.81

1.90–4.14

< 0.001

1.89

1.51–2.36

< 0.001

1.08

0.84–1.40

0.53

 Bachelor degree or less

2.12

1.62–2.76

< 0.001

1.43

1.20–1.70

< 0.001

1.05

0.85–1.30

0.66

 High school or less

Reference

Reference

Reference

Planned pregnancyv1

 Yes

1.09

0.86–1.37

0.48

1.48

1.27–1.73

< 0.001

1.18

0.98–1.42

0.08

 No

 

Reference

  

Reference

  

Reference

 

Delivery by cesarean

 Yes

0.93

0.75–1.17

0.55

0.88

0.76–1.02

0.10

1.10

0.93–1.30

0.28

 No

 

Reference

  

Reference

  

Reference

 

Did you smoke any tobacco products in the month before delivery?v4

 Yes

 

Reference

  

Reference

  

Reference

 

 No

2.32

1.56–3.45

< 0.001

2.04

1.19–3.45

0.01

3.12

1.43–7.14

0.01

STAI-Tv1

0.985

0.975–0.996

0.01

0.990

0.983–0.998

0.01

0.997

0.988–1.006

0.47

Random effect Estimate (SE)

0.121 (0.07)

0.074 (0.04)

0.006 (0.01)

ICC

0.04

0.02

0.002

  1. V1 (gestational age 6 weeks 0 days to 13 weeks 6 days), V2 (gestational age 16 weeks 0 days to 21 weeks 6 days), V3 (gestational age 22 weeks 0 days to 29 weeks 6 days), V4 (at time of delivery) – Variables obtained at Visits 1, 2, 3, 4 respectively
  2. Model Area Under the Curve (AUC) reported as AUC (95% confidence interval)
  3. C Variables obtained from chart abstraction, FPL Federal poverty level, STAI-T Spielberger State-Trait Anxiety Inventory, ICC Intra-class correlation
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BMC Pregnancy and Childbirth

ISSN: 1471-2393

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