Table 3 Summary of aggregated results for each the items of the Drummond and Jeffersons 35- item checklist
| Â | Yes (%) | No (%) | Can't tell (%) | n/a (%) |
|---|---|---|---|---|
Study design | ||||
 1. The research question is stated. | 26 (90) | 0 (0) | 3 (10) |  |
 2. The economic importance of the research question is stated. | 8 (28) | 21 (72) | 0 (0) | |
 3. The viewpoint(s) of the analysis are clearly stated and justified. | 26 (90) | 3 (10) | 0 (0) | |
 4. The rationale for choosing alternative programmes or interventions compared is stated. | 28 (97) | 1 (3) | 0 (0) | |
 5. The alternatives being compared are clearly described. | 26 (90) | 0 (0) | 3 (10) | |
 6. The form of economic evaluation used is stated. | 29 (100) | 0 (0) | 0 (0) | |
 7. The choice of form of economic evaluation is justified in relation to the questions addressed. | 0 (0) | 29 (100) | 0 (0) | |
Data collection | ||||
 8. The source(s) of effectiveness estimates used are stated. | 29 (100) | 0 (0) | 0 (0) | 0 (0) |
 9. Details of the design and results of effectiveness study are given (if based on a single study). | 4 (14) | 0 (0) | 0 (0) | 25 (86) |
 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). | 23 (79) | 0 (0) | 0 (0) | 6 (21) |
 11. The primary outcome measure(s) for the economic evaluation are clearly stated. | 28 (97) | 1 (3) | 0 (0) | 0 (0) |
 12. Methods to value benefits are stated. | 25 (86) | 4 (14) | 0 (0) | 0 (0) |
 13. Details of the subjects from whom valuations were obtained were given. | 8 (28) | 21 (72) | 0 (0) | 0 (0) |
 14. Productivity changes (if included) are reported separately. | 6 (21) | 0 (0) | 0 (0) | 23 (79) |
 15. The relevance of productivity changes to the study question is discussed. | 3 (10) | 3 (10) | 1 (3) | 22 (76) |
 16. Quantities of resource use are reported separately from their unit costs. | 12 (41) | 17 (59) | 0 (0) | 0 (0) |
 17. Methods for the estimation of quantities and unit costs are described. | 19 (65) | 7 (24) | 3 (10) | 0 (0) |
 18. Currency and price data are recorded. | 22 (76) | 0 (0) | 7 (24) | 0 (0) |
 19. Details of currency of price adjustments for inflation or currency conversion are given. | 22 (76) | 7 (24) | 0 (0) | 0 (0) |
 20. Details of any model used are given. | 29 (100) | 0 (0) | 0 (0) | 0 (0) |
 21. The choice of model used and the key parameters on which it is based are justified. | 29 (100) | 0 (0) | 0 (0) | 0 (0) |
Analysis and interpretation of results | ||||
 22. Time horizon of costs and benefits is stated. | 26 (90) | 3 (10) | 0 (0) | 0 (0) |
 23. The discount rate(s) is stated. | 25 (86) | 4 (14) | 0 (0) | 0 (0) |
 24. The choice of discount rate(s) is justified. | 8 (28) | 18 (62) | 0 (0) | 3 (10) |
 25. An explanation is given if costs and benefits are not discounted. | 4 (14) | 4 (14) | 0 (0) | 21 (72) |
 26. Details of statistical tests and confidence intervals are given for stochastic data. | 19 (65) | 10 (34) | 0 (0) | 0 (0) |
 27. The approach to sensitivity analysis is given. | 28 (97) | 1 (3) | 0 (0) | 0 (0) |
 28. The choice of variables for sensitivity analysis is justified. | 26 (90) | 3 (10) | 0 (0) | 0 (0) |
 29. The ranges over which the variables are varied are justified. | 20 (69) | 9 (31) | 0 (0) | 0 (0) |
 30. Relevant alternatives are compared. | 22 (76) | 0 (0) | 7 (24) | 0 (0) |
 31. Incremental analysis is reported. | 18 (62) | 4 (14) | 7 (24) | 0 (0) |
 32. Major outcomes are presented in a disaggregated as well as aggregated form. | 21 (72) | 8 (28) | 0 (0) |  |
 33. The answer to the study question is given. | 21 (72) | 3 (10) | 5 (17) | |
 34. Conclusions follow from the data reported. | 20 (69) | 0 (0) | 9 (31) | |
 35. Conclusions are accompanied by the appropriate caveats. | 28 (97) | 1 (3) | 0 (0) | |