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Association between environmental tobacco smoke exposure and dementia syndromes
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  • Published on: 14 March 2013
    Re:Environmental tobacco smoke and severe dementia syndromes

    In Reply,

    Professor Kawada [1] commented on our use of Cox regression for the analysis of cross-sectional data. [2] Although logistic regression is often used to compute a prevalence odds ratio (POR) in cross-sectional studies as an estimate of relative risk (RR), when the outcome is not rare this overestimates the RR, sometimes changing the study conclusion. Cox regression has been suggested instead to estima...

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    Conflict of Interest:
    None declared.
  • Published on: 7 February 2013
    Environmental tobacco smoke and severe dementia syndromes

    Chen et al [1] reported the positive association between environmental tobacco smoke (ETS) and severe dementia syndromes. They mentioned that Cox regression model was applied to detect statistical significance.

    I have two queries on their study. First, they conducted cross- sectional study and Cox regression analysis was applied to detect relative risk by adjusting several confounders. They described the methodol...

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    Conflict of Interest:
    None declared.