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Extended report
Subclinical renal dysfunction is independently associated with cardiovascular events in rheumatoid arthritis: the CARRÉ Study
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    Needed number of events for logistic regression analysis

    Dear Editor,

    I read with great interest the paper by van Sijl et al., (1) a 3-year longitudinal study by following patients with rheumatoid arthritis (RA) to know the effect of the estimated renal function on cardiovascular (CV) events. Out of 330 participants, 23 had CV event (7%). They mentioned the study limitation of low statistical power derived from small number of CV event and restriction of confounding va...

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    Conflict of Interest:
    None declared.