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The socioeconomic gradient of secondhand smoke exposure in children: evidence from 26 low-income and middle-income countries
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  • Published on:
    Methodological pitfalls in the measurement and decomposition of socioeconomic inequality of smoke exposure
    NOT PEER REVIEWED I would like to point out a few disturbing inaccuracies in the methodology and interpretation. Since the health variable is binary, the authors apply "Wagstaff's correction" to the Concentration Index. This is a perfectly legitimate decision, but the authors mistakenly suggest that this correction can be applied to both the relative and the absolute version of the index, yielding two normalized indices. In fact,...
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    Conflict of Interest:
    None declared.