ERCP-Related Adverse Events in Primary Sclerosing Cholangitis: A Systematic Review and Meta-Analysis
Table 4
Risk of bias of cohort studies using the Newcastle-Ottawa scale.
Selection
Comparability
Outcome
Representativeness of the exposed cohort
Selection of the nonexposed 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
Length of follow-up sufficient for outcomes to occur
Adequacy of follow-up of cohorts
Adler (2016)
—
—
—
Bangarulingam (2009)
—
—
Etzel (2008)
—
—
Ismail (2012)
NR
NR
—
Navaneethan (2015)
NR
NR
Peiseler (2018)
Von Seth (2015)
–
—
NR, not relevant. Asterisks indicate the star rating according to the Newcastle-Ottawa scale for cohort studies. A study can be awarded a maximum of 4 stars for selection, 2 stars for comparability, and 3 stars for the outcome.
