Table 1 Study quality assessment tool
Study quality criteria | Example of high score |
|---|---|
Selection criteria used | Appropriate inclusion/exclusion criteria; low response rates kept to a minimum or possible explanations provided |
Measurement of study variables | Validated method for lipid measurement; patient self-reports validated against appropriate existing records |
Design specific sources of bias | Identification and selection of participants limited (e.g. only diabetic patients) |
Use of appropriate statistics | Primary analysis of effect and control of confounding in analyses |
Possible sources of bias | Statement of funding sources, conflict of interest |