Table 4.

Quality assessment with Drummond–Jefferson checklist

		Alleweldt et al. 2021	Brown et al. 2021	Elliott et al. 2021	Ford et al. 2021	Gordon et al. 2021	Kumar et al. 2021	Dymond et al. 2020	Lee et al. 2020	Jain et al. 2019
Study design
1	The research question is stated	X	X	X	X	X	X	X	X	X
2	The economic importance of the research question is stated	X	X	X	X	X	X	X	X	X
3	The viewpoint(s) of the analysis are clearly stated and justified	X	X	X	X	X	X	X	X	X
4	The rationale for choosing alternative programmes or interventions compared is stated	X	X	X	X	X	X	X	X	X
5	The alternatives being compared are clearly described	X	X	X	X	X	X	X	X	X
6	The form of economic evaluation used is stated	X	X	X	X	X	X	X	X	X
7	The choice of form of economic evaluation is justified in relation to the questions addressed	X	X	X	X	X	X	X	X	X
Data collection
8	The source(s) of effectiveness estimates used are stated		X	X		X	X	X	X	X
9	Details of the design and results of effectiveness study are given (if based on a single study)			X		X			X	X
10	Details of the methods of synthesis or meta-analysis of estimates are given (if based on a synthesis of a number of effectiveness studies)
11	The primary outcome measure(s) for the economic evaluation are clearly stated	X	X	X	X	X	X	X	X	X
12	Methods to value benefits are stated	X	X	X	X	X	X	X	X	X
13	Details of the subjects from whom valuations were obtained were given	X		X		X			X	X
14	Productivity changes (if included) are reported separately	X								X
15	The relevance of productivity changes to the study question is discussed									X
16	Quantities of resource use are reported separately from their unit costs	X					X		X
17	Methods for the estimation of quantities and unit costs are described	X			X		X	X	X	X
18	Currency and price data are reported	X	X	X	X	X	X	X	X	X
19	Details of currency of price adjustments for inflation or currency conversion are given		X	X	X	X		X
20	Details of any model used are given		X	X	X	X	X	X	X	X
21	The choice of model used and the key parameters on which it is based are justified	X	X	X	X	X	X	X	X	X
Analysis and interpretation of results
22	Time horizon of costs and benefits is stated	X	X				X
23	The discount rate(s) are stated			X			X
24	The choice of discount rate(s) is justified			X			X
25	An explanation is given if costs and benefits are not discounted			X				X
26	Details of statistical tests and confidence intervals are given for stochastic data		X	X	X	X
27	The approach to sensitivity analysis is given	X		X		X	X	X	X
28	The choice of variables for sensitivity analysis is justified	X				X	X	X	X
29	The ranges over which the variables vary are justified	X		X		X	X	X	X	X
30	Relevant alternatives are compared	X	X	X	X	X	X	X	X	X
31	Incremental analysis is reported	X		X			X	X
32	Major outcomes are presented in a disaggregated as well as aggregated form	X		X
33	The answer to the study question is given	X	X	X	X	X	X	X	X	X
34	Conclusions follow from the data reported	X	X	X	X	X	X	X	X	X
35	Conclusions are accompanied by the appropriate caveats	X	X	X	X	X	X	X	X