Research Article
Metformin Use and Mortality in Women with Ovarian Cancer: An Updated Meta-Analysis
Table 2
Detailed quality evaluation for the included studies with the Newcastle–Ottawa scale.
| | Study | Representativeness of the exposed cohort | Selection of the nonexposed cohort | Ascertainment of exposure | Outcome not present at baseline | Control for age | Control for other confounding factors | Assessment of outcome | Enough long follow-up duration | Adequacy of follow-up of cohorts | Total |
| | Currie, 2012 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 7 | | Romero, 2012 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 | | Kumar, 2013 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 | | Shah, 2014 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 | | Bar, 2016 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 8 | | Garcia, 2017 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 8 | | Wang, 2017 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 | | Urpilainen, 2018 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 | 1 | 8 | | Gonzalez, 2020 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 7 |
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