and significant at the 5 % level for the
remaining measure. The effects are smaller for later
assessment periods. At 8 and 21 months, the odds ratios in
Column 5 are lower than the odds ratios in Column 4 in
almost all cases; however, the differences are not statistically
significant. At 33 months, the differences are larger
again, and are significant at the 1 % level for three of the
seven measures of breastfeeding.