The difference in means (SE) is 0.12 (0.10) with 95% CI [-0.08, 0.31] (original scale) The normal distributional estimate obtained on the transformed scale for the difference in proportions (SE) of pre-term live births between primipari and multipari mothers was 0.020 (0.009) with 95% DCI of [0.003, 0.037] (marginally significant reflecting a small significance for the mean difference in the transformed scale).
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Dichotomisation using a distributional approach when the outcome is skewed.
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