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. 2017 Sep 11;7:11058. doi: 10.1038/s41598-017-10729-9

Table 1.

Quality assessment of the included studies.

Study Cohort selection Comparability Outcome Score
Representativeness of the exposed cohort Selection of non-exposed cohort Ascertainment of exposure Demonstration that outcome of interest was not present at start of study Comparability of cohorts on the basis of the design and analysis Assessment of outcome Follow-up was long enough for outcome to occur Adequacy of follow up
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