Association of chronic kidney disease with in-hospital mortality of cardiogenic shock patients undergoing veno-arterial extracorporeal membrane oxygenation

Table 2 Critical appraisal by Newcastle-Ottawa Scale

Ref.	Q1	Q2	Q3	Q4	Q5	Q6	Q7	Q8	Overall
Jeong et al[11], 2024	√	√	√	√	√	√	√	√	9/9
Laimoud and Alanazi[13], 2020	√	√	√	√	-	√	√	√	7/9
Kuroki et al[23], 2016	√	√	√	√	√	√	√	√	9/9
Aso et al[16], 2016	√	√	√	√	√	√	√	√	9/9
Rastan et al[19], 2010	√	√	√	√	√	√	√	√	9/9
Wang et al[17], 2022	√	√	√	√	√	√	√	√	9/9
Salna et al[22], 2020	√	√	√	√	√	√	√	√	9/9
Zhang et al[12], 2022	√	√	√	√	√	√	√	√	9/9
Peigh et al[15], 2015	√	√	√	√	√	√	√	√	9/9
Schmidt et al[14], 2015	√	√	√	√	√	√	√	√	9/9
Vigneshwar et al[21], 2020	√	√	√	√	√	√	√	√	9/9
Papadopoulos et al[20], 2015	√	√	√	√	√	√	√	√	9/9
Rubino et al[18], 2018	√	√	√	√	√	√	√	√	9/9

A summary plot of the selected studies. Risk of bias assessment using the Newcastle-Ottawa Scale. Q1: Representativeness of exposed cohort. Q2: Selection of non-exposed cohort. Q3: Ascertainment of exposure. Q4: Demonstration that the outcome of interest was not present at the start of the study. Q5: Comparability of cohorts on the basis of the design or analysis (2 points). Q6: Assessment of outcome. Q7: Was the follow-up long enough for outcomes to occur? Q8: Adequacy of follow-up of study groups. An overall Newcastle-Ottawa Scale score of 7 and above is considered low risk, a score of 5 to 7 is considered to have some concerns, and a score under 5 is considered high risk.