Table 1 The quality of methodology of studies
From: Men’s willingness to pay for prostate cancer screening: a systematic review
| Checklist of what should be reported in published CV studies | Neumann et al. 2010 [18] | Yasunaga 2008 [19] | Yasunaga et al. 2006 [20] | Yasunaga et al. 2011 [21] | Pedersen et al. 2011 [22] | Mayer et al. 2018 [23] |
|---|---|---|---|---|---|---|
| CV development and context | ||||||
| Country where the CV survey has been conducted and health care financing details | Yes | Yes | Yes | Yes | Yes | Yes |
| Focus—methodological or policy | Yes | Yes | Yes | Yes | Yes | Yes |
| Specificity of questionnaire (part of wider survey) | Yes | Yes | Yes | Yes | Yes | Yes |
| Details of other measures of QoL incorporated | No | Yes | Yes | Yes | Yes | No |
| Scenario development | Yes | Yes | Yes | Yes | Yes | Yes |
| Welfare measure (WTP or WTA) | Yes | Yes | Yes | Yes | Yes | Yes |
| CV scenario description | ||||||
| Intervention(s) | Yes | Yes | Yes | Yes | Yes | Yes |
| Partiality (single good or close substitutes) | Yes | Yes | Yes | Yes | Yes | Yes |
| Outcomes (health status, probability, and time) | Yes | Yes | Yes | Yes | Yes | Yes |
| Non-outcomes (information, care, other) | Yes | Yes | Yes | Yes | Yes | Yes |
| Payment vehicle | Yes | No | No | No | Yes | No |
| Presentation of uncertainty/risk | Yes | Yes | Yes | Yes | Yes | No |
| Survey period | No | Yes | Yes | Yes | Yes | Yes |
| Time period for WTP | No | No | No | No | No | No |
| Question/elicitation format | Yes | Yes | Yes | Yes | Yes | Yes |
| CV reporting and results | ||||||
| Method of data collection | Yes | Yes | Yes | Yes | Yes | Yes |
| Type of respondent | Yes | Yes | Yes | Yes | Yes | Yes |
| Sample size | Yes | Yes | Yes | Yes | Yes | Yes |
| Response rate | Yes | Yes | Yes | Yes | Yes | Yes |
| Type of outcomes incorporated (use, option, or externality value) | Yes | Yes | Yes | Yes | No | Yes |
| Duration of interview/length of questionnaire | No | Yes | Yes | Yes | Yes | Yes |
| WTP values (results of the studies) | Yes | Yes | Yes | Yes | Yes | Yes |
| Transformation of values from one context/time to another | No | No | No | No | No | No |
| Price year | No | No | No | No | No | No |
| Currency | Yes | Yes | Yes | Yes | Yes | Yes |
| Cost of intervention | No | No | No | No | No | No |
| Cost–benefit ratio | No | No | No | No | No | No |
| Time period used in analysis | No | No | No | No | No | No |
| CV validity and reliability | ||||||
| Tests for bias—order effect, starting point, range, interviewer, strategic | Yes | Yes | Yes | Yes | Yes | No |
| Statistical analysis performed | Yes | Yes | Yes | Yes | Yes | Yes |
| Assessment of zero/high bids | Yes | No | Yes | Yes | Yes | Yes |
| Distributional issues consider | Yes | Yes | Yes | Yes | No | Yes |
| Validity tests | Yes | Yes | Yes | Yes | Yes | No |
| Reliability tests | Yes | Yes | Yes | Yes | Yes | No |
| Rate of responses | 74% | 76% | 79% | 79% | 76% | 65% |