Heterogeneous Effects by Mental Health During Pregnancy and Breastfeeding Intention
We re-estimated Model C separately for mothers who were, and who were not, depressed during pregnancy (in terms of having a score EPDS >14 at least once during pregnancy). As before, we estimated regressions separately for each time at which postnatal depression was assessed (8 weeks, and 8, 21 and 33 months postpartum); for each of these time periods, we estimated seven models, one for each discrete measure of breastfeeding. However, instead of simply controlling for whether or not mothers breastfed for the relevant duration, we identify four groups of women, by whether they had planned to breastfeed, and whether they had actually breastfed for the relevant duration. These four groups are:
• Mothers who had not planned to breastfeed, and who did not breastfeed (reference group)
• Mothers who had not planned to breastfeed, but who did actually breastfeed
• Mothers who had planned to breastfeed, but who did not actually breastfeed
• Mothers who had planned to breastfeed, and who did actually breastfeed
Each regression thus generates three coefficients of interest; these coefficients are expressed as odds ratios, relative to the reference group.
Table 4 presents results for mothers without prenatal depression symptoms. Column (2) displays odds ratios and confidence intervals for mothers who did not plan to breastfeed, but who did actually breastfeed; column (3) indicates whether these mothers are significantly different from the mothers in the reference group.
Heterogeneous Effects by Mental Health During Pregnancy and Breastfeeding IntentionWe re-estimated Model C separately for mothers who were, and who were not, depressed during pregnancy (in terms of having a score EPDS >14 at least once during pregnancy). As before, we estimated regressions separately for each time at which postnatal depression was assessed (8 weeks, and 8, 21 and 33 months postpartum); for each of these time periods, we estimated seven models, one for each discrete measure of breastfeeding. However, instead of simply controlling for whether or not mothers breastfed for the relevant duration, we identify four groups of women, by whether they had planned to breastfeed, and whether they had actually breastfed for the relevant duration. These four groups are:• Mothers who had not planned to breastfeed, and who did not breastfeed (reference group)• Mothers who had not planned to breastfeed, but who did actually breastfeed• Mothers who had planned to breastfeed, but who did not actually breastfeed• Mothers who had planned to breastfeed, and who did actually breastfeedEach regression thus generates three coefficients of interest; these coefficients are expressed as odds ratios, relative to the reference group.Table 4 presents results for mothers without prenatal depression symptoms. Column (2) displays odds ratios and confidence intervals for mothers who did not plan to breastfeed, but who did actually breastfeed; column (3) indicates whether these mothers are significantly different from the mothers in the reference group.
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