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% |