planned to breastfeed, and who did breastfeed for the relevant
duration. Column (6) indicates whether the odds ratios
in Column (4) and (5) are significantly different from each
other. Thus, the test results in Column (3) indicate whether
breastfeeding makes a difference in the case of women who
did not originally plan to breastfeed, while the tests in Column
(6) indicate whether breastfeeding makes a difference in
the case of mothers who had planned to breastfeed.
The strongest result from Table 4 is that breastfeeding is
strongly associated with a lower risk of depression at