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Table 1 The detailed quality assessment of prognostic studies

From: Relationship of lymphovascular invasion with lymph node metastasis and prognosis in superficial esophageal carcinoma: systematic review and meta-analysis

AuthorYears IncludedRegionComment 1Comment 2Comment 3Comment 4What are the results
Leggett (2015) [7]1995-2011USAYesYesYesYesSurvival curve, CI is narrow, conclusion is promotable
Yamashina (2013) [8]1995-2010JapanYesYesYesYesCI is relative marrow, conclusion is promotable
Tanaka (2014) [9]1988-2010JapanYesYesYesYesCI is narrow, conclusion is promotable
Xue (2018) [10]1990-2004ChinaYesYesYesYesCI is relative marrow, conclusion is relative promotable
  1. CI Confidence interval