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Table 3 Quality assessment for cohort study

From: Significant association between vitamin D deficiency and sepsis: a systematic review and meta-analysis

Study (Year) Selection Comparability Outcome Total
Representativeness of the sample Non-expose group from same community Outcome of interest was not present at start of study Validated measurement tool Comparability of different samples on the basis of the design or analysis Assessment of outcome Follow up ≥1 month Adequacy of follow up
truly representative somewhat representative     study controls for important factor study controls for any additional factor independent blind assessment record linkage   Complete Small number loss follow-up
Braun 2012 *   * * * * *   * *   * 9
Braun 2011 *   * * * * *   * *   * 9
Flynn 2012   * * * *     * * *   7
Jovanovich 2014 *   * * * * *   * * *   9
Moromizato 2013 *   * * * * *   * *   * 9
Quraishi 2013 *   * * * * *   * * *   9
Lange 2013 *   * * * * *   * * *   9