Diagnostic and prognostic utility of serum bile acid in liver transplant recipients: A systematic review and quantitative synthesis

Table 2 Risk of assessment of included studies using the Quality in Prognosis Studies tool

Ref.	Study participation	Study attrition	Prognostic factor measurement	Outcome measurement	Confounding	Statistical analysis and statistical reporting
Azer et al[9]	Low	Low	Moderate	Low	High	Moderate
Janssen et al[10]	Low	Low	Low	Low	High	Moderate
Sundararajan et al[11]	Low	Low	Moderate	Low	High	Moderate
Muraca et al[12]	Low	Low	Low	Low	High	Moderate
Wu et al[14]	Low	Low	Low	Low	Low	Low