Table 2.
Quality assessment.
| First author | Population representative | Sample size adequate |
Confounders | Statistical analysis |
Missing data |
Methodology of the outcome |
Objective assessment |
OVERALL (0-3, higher score = lower risk of bias) |
|---|---|---|---|---|---|---|---|---|
| Elizabeth Whittaker,2020(Whittaker et al., 2020) | 3 | 3 | 3 | 3 | 2 | 1 | 3 | 2.57 |
| Zahra Belhadjer,2020(Belhadjer et al., 2020) | 1 | 3 | 2 | 3 | 2 | 3 | 2 | 2.28 |
| Marion Grimaud,2020(Grimaud et al., 2020) | 2 | 2 | 2 | 2 | 2 | 1 | 2 | 1.85 |
| Julie Toubiana,2020(Toubiana et al., 2020a) | 3 | 2 | 2 | 2 | 2 | 3 | 2 | 2.28 |
| Tristan Ramcharan,2020(Ramcharan et al., 2020) | 3 | 2 | 2 | 2 | 2 | 3 | 2 | 2.28 |
| Marie Pouletty,2020(Pouletty et al., 2020) | 3 | 2 | 3 | 3 | 2 | 2 | 3 | 2.57 |
| Julie Toubiana,2020(Toubiana et al., 2020a) | 2 | 2 | 0 | 2 | 2 | 2 | 2 | 1.71 |