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Table 3 Quality assessment of eligible studies

From: Prognostic value of lymph node ratio in laryngeal and hypopharyngeal squamous cell carcinoma: a systematic review and meta-analysis

StudyInclusion and exclusion criteriaProspective/RetrospectivePatient characteristicsTumor characteristicsLNR measurementsEndpointFollow-up periodPatients unavailable for statistical analysisQuality scale
Choi 2019 [12]111100105
Ye 2018 [22]111101117
Lo 2017 [15]111100105
Suzuki 2016 [21]111101106
Imre 2016 [19]111101106
Ryu 2015 [16]111111107
Kunzel 2015 [20]111111107
Joo 2015 [14]111110106
Hua 2015 [13]011100104
Wang 2014 [28]111100004
Yu 2013 [29]111100105
Wang 2013 [27]111100116
Grasl 2019 [18]111101106
  1. LNR Lymph node ratio