Unadjusted associations between demographic characteristics and rate of influenza-like illness among subjects who were ILI free at baseline (N = 938).
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aICC = Intracluster correlation coefficient; RR = rate ratio; 95% CI = 95% confidence interval.bVariables added to the final adjusted model if the magnitude of effect was more than a 10% increase or decrease from the null value (RR = 1.00).
创建时间：
2015-12-02
