Figure 2

Drummond methodological quality summary results (n = 59). Items: 1. Well-defined question. 2. Competing alternatives well described. 3. Effectiveness established. 4. All important and relevant costs and consequences identified. 5. Measurement accurately performed. 6. Valuation credibility. 7. Discounting. 8. Incremental analysis performed. 9. Allowance made for uncertainty. 10. Discussion.