Table A3.

The Drummond checklist for the risk of bias assessment of the trial-based economic evaluation studies.

Drummond Checklist/Study Authors	Anopa, Y. [19]	Blaikie, D.C. [20]	Kowash, M.B. [15]	Stearns, S.C. [18]	Samnaliev, M. [21]	Pukallus, M. [16]	Quinoez, R.B. [17]	Plonka, K.A. [23]	Folayan, M.O. [30]	Takeuchi, R. [22]
Was a Well-Defined Question Posed in an Answerable Form?	yes	yes	yes	yes	yes	yes	yes	yes	yes	yes
Was a Comprehensive Description of the Competing Alternatives Given?	yes	yes	yes	yes	yes	yes	yes	yes	yes	no
Was the Effectiveness of the Program Established?	yes	yes	yes	yes	yes	yes	no	yes	yes	yes
Were All the Important and Relevant Costs and Consequences for Each Alternative Identified?	yes	yes	yes	yes	yes	yes	yes	no	NA	no
Were Costs and Consequences Measured Accurately in Appropriate Physical Units?	yes	yes	yes	yes	yes	yes	yes	NA	NA	yes
Were Costs and Consequences Valued Credibly?	yes	yes	yes	yes	yes	yes	yes	NA	NA	yes
Were Costs and Consequences Adjusted for Differential Timing?	yes	yes	no	yes	NA	yes	yes	NA	NA	NA
Was an Incremental Analysis of Costs and Consequences of Alternatives Performed?	yes	yes	yes	yes	yes	yes	yes	NA	NA	NA
Was Allowance Made for Uncertainty in the Estimates of Costs and Consequences?	no	no	no	yes	NA	no	no	NA	NA	NA
Did the Presentation and Discussion of Study Results Include All Issues of Concern to Users?	yes	yes	yes	yes	yes	yes	yes	yes	yes	Yes
Score	9 from 10	9 from 10	7 form 10	10 from 10	8 from 10	9 from 10	8 from 10	4 from 10	4 from 10	5 from 10