Table 3.
Quality assessment of the case-control studies in meta-analysis.a
| Study | Selection |
Comparability |
Exposure |
Overall Quality Scores | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Adequate Case Definition | Representativeness of Cases | Control Selection | Definition of Controls | Controls for Other Pesticides | Controls for Age | Exposure Assessment | Method Consistency | Non-response Rate | ||
| De Roos (2003) [16] | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 6 |
| Eriksson et al. [17] | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 7 |
| Hardell et al. [18] | 1 | 1 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 6 |
| McDuffie et al. [43] | 1 | 1 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 6 |
| Orsi et al. [19] | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 2 |
a
The study quality was assessed according to the Newcastle Ottawa Quality assessment scale for case-control studies [44]. One point was awarded for yes, and zero points were awarded for no, unable to determine, or inadequate.