Table 4 ROBINS-I risk of bias assessment
Study | Confounding | Selection of participants into study | Classification of intervention | Deviation from intended intervention | Missing data | Measurement of outcomes | Selection of the reported results | Over all |
|---|---|---|---|---|---|---|---|---|
Nayar et al. [15] | Serious risk | Low risk | Low risk | Low risk | Low risk | Low risk | Moderate risk | Serious risk |
Verrone et al. [14] | Serious risk | Low risk | Low risk | Low risk | Low risk | Moderate risk | Moderate risk | Serious risk |