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Table 3 Newcastle-Ottawa Quality Assessment Scale (NOS) for included case-control studies

From: Old men with prostate cancer have higher risk of Gleason score upgrading and pathological upstaging after initial diagnosis: a systematic review and meta-analysis

Study Selection Comparability Exposure Total score (sum of stars)
Is the case definition adequate? Representativeness of the cases Selection of Controls Definition of Controls Ascertainment of exposure Same method of ascertainment for cases and controls Non-response rate
Anderson 2015 [32] 8
Audenet 2017 [14] 8
Bullock 2019 [15] 5
Dai 2019 [33] 8
Dinh 2015 [16] 6
Dinizo 2018 [6] 7
Epstein 2012 [17] 7
Ferro 2019 [18] 8
Gondo 2015 [9] 7
Herrera-Caceres 2020 [34] 7
Jalloh 2015 [19] 8
Jeon 2017 [10] 8
Kim 2013 [22] 8
Kwon 2016 [23] 8
Leeman 2019 [11] 7
Luzzago 2018 [20] 8
Lyon 2016 [21] 8
Magheli 2010 [24] 7
Martin 2017 [25] 7
Mizuno 2016 [26] 6
Morlacco 2016 [5] 7
Oh 2012 [27] 8
Pietzak 2014 [28] 7
Shoag 2020 [29] 5
Weiner 2015 [30] 5
Wong 2012 [31] 8
Zanaty 2018 [12] 8