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Quality assessment of Poujol-Robert study [13] (cross-sectional study)
| Representativeness of the sample | Low risk |
| Sample size | Low risk |
| Non-respondents | Low risk |
| Ascertainment of the exposure | Low risk |
| Adjustment for primary and secondary factors | Low risk |
| Assessment of the outcome | Low risk |
| Statistical test | Low risk |
| Quality | High quality |
