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Classification of conclusions regarding costs. Values are number of papers with justified conclusions out of the total number in each category (percentages)
| Conclusion | With statistical inference | Without statistical inference | Total |
|---|---|---|---|
| Claimed difference | 13/16 | 0/20 | 13/36 |
| Claimed no difference | 1/7 | 0 | 1/7 |
| Claimed insufficient evidence of a difference | 2/2 | 0 | 2/2 |
| Total | 16/25 (64) | 0/20 | 16/45 (36) |
