Comparative effectiveness of several adjuvant therapies after hepatectomy for hepatocellular carcinoma patients with microvascular invasion

Table 3 Methodological quality assessment for cohort studies using the Newcastle-Ottawa Scale

Ref.	Selection				Comparability	Exposure			Quality Score
	Representativeness of the exposed cohort	Selection of the non-exposed cohort	Ascertainment of exposure	Demonstration that outcome of interest was not present at start of study	Comparability of cohorts on the basis of the design or analysis	Assessment of outcome	Was follow-up long enough for outcomes to occur	Adequacy of follow up of cohorts
Li et al[8], 2021	1	1	1		2	1	1		7
Zhang 2019	1	1	1	1	2	1	1		8
Huang et al[18], 2019	1	1	1		2	1	1	1	8
Hsiao et al[19], 2017	1	1	1	1	1	1	1		7
Wang et al[10], 2020	1	1	1		2	1	1		7
Wang et al[21], 2019	1	1	1		1	1	1		6
Qiu et al[22], 2022	1	1	1		1	1	1	1	7
Wang et al[23], 2019	1	1	1		2	1	1		7
Qi et al[24], 2019	1	1	1		2	1	1		7
Wang et al[25], 2018	1	1	1		1	1	1	1	7
Sun et al[26], 2016	1	1	1		1	1	1		6