Predictors of Breastfeeding

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The following table came from a study on predictors of breastfeeding. The authors used ordinal logistic regression, where the outcome variable was coded 2=exclusive breastfeeding; 1=partial breastfeeding, and 0=no breastfeeding. Questions are based on the “breastfeeding at 3 months after delivery” column.

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Table 3. Ordinal Logistic Regression Analysis of Factors Associated with Breastfeeding

Variable Breastfeeding Initiation during Hospital Stay (n =2,064) OR (95% CI) Breastfeeding at 1 mo after Delivery (n =1,336)* OR (95% CI) Breastfeeding at 3 mo after Delivery (n =1,453)OR (95% CI)
Age (yr)
  < 20 0.49 (0.26–0.90) 0.28 (0.10–0.66) 0.28 (0.11–0.74)
  20–24 0.67 (0.48–0.94) 0.73 (0.48–1.12) 0.96 (0.63–1.47)
  25–29 0.80 (0.59–1.07) 1.05 (0.73–1.50) 0.94 (0.65–1.35)
  30–34 0.87 (0.64–1.18) 0.98 (0.68–1.41) 1.31 (0.90–1.90)
Education
  Junior high school or lower 0.35 (0.25–0.49) 1.00 (0.64–1.57) 0.94 (0.63–1.42)
  Senior high school or vocational school 0.43 (0.35–0.53) 0.74 (0.58–0.95) 0.76 (0.59–0.97)
Work status
  Full time 1.23 (1.03–1.48) 0.58 (0.46–0.72) 0.38 (0.30–0.48)
  Part time 1.00 (0.73–1.37) 1.12 (0.74–1.69) 1.03 (0.71–1.50)
Father’s support for breastfeeding 1.02 (1.01–1.03) 1.03 (1.02–1.04) 1.01 (0.995–1.02)
Method of delivery
  Cesarean 1.19 (0.995–1.43) 0.69 (0.55–0.86) 0.70 (0.56–0.88)
  Assisted vaginal 0.88 (0.68–1.15) 0.75 (0.53–1.06) 0.67 (0.48–0.93)
Initiation of breastfeeding within 30 min of delivery NA 1.47 (1.13–1.90) 1.57 (1.21–2.05)
The dependent variable was coded as exclusive breastfeeding (2), partial breastfeeding (1), and no breastfeeding (0). The reference group comprised mothers aged 35 years or more, who had an educational level of university or higher, who did not work, who had unassisted vaginal delivery, who did not initiate breastfeeding within 30 min of delivery, and who initiated breastfeeding during hospital stay.
Among mothers who initiated breastfeeding during hospital stay ; †among mothers who breastfed at 1 mo after delivery.
NA = not applicable.
  1. What factors predicted a significantly higher level of breastfeeding at 3 months post-delivery?
  2. Among all the predictor variables shown in the table above, how many categorical predictors are there? Binary? Ordinal? Continuous

 

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