Table 2 Risk of bias in randomized controlled trials reporting on interventions to increase the uptake of vaccines recommended during pregnancy
Study author and year | Randomization process | Deviations from the intended intervention(s) | Missing outcome data | Measurement of the outcome | Selection of the reported result | Overall |
|---|---|---|---|---|---|---|
Patient-level Interventions | ||||||
Frew et al.14 | Some concerns | Low risk | Low risk | Low risk | Low risk | Some concerns |
Goodman et al.15 | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk |
Kriss et al.24 | Some concerns | Low risk | Low risk | Low risk | Low risk | Some concerns |
Meharry et al.17 | Some concerns | Some concerns | Low risk | Low risk | Low risk | Some concerns |
Moniz et al.18 | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk |
O’Leary et al.26 | Low risk | Low risk | Low risk | Some concerns | Low risk | Some concerns |
Payakachat et al.25 | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk |
Regan et al.20 | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk |
Sato and Fintan28 | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk |
Stockwell et al.21 | Some concerns | Low risk | Low risk | Low risk | Low risk | Some concerns |
Wong et al.22 | Some concerns | Low risk | Low risk | Low risk | Low risk | Some concerns |
Yudin et al.23 | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk |
Provider or systems-level interventions | ||||||
Mwase et al.37 | Some concerns | Low risk | Low risk | Low risk | Low risk | Some concerns |
Wootton et al.48 | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk |
Patient and provider or systems-level interventions | ||||||
Chamberlain et al.45 | Some concerns | Some concerns | Low risk | Low risk | Low risk | Some concerns |
Jordan et al.16 | Low risk | Low risk | High risk | Low risk | Some concerns | High risk |
Omer et al.46 | Low risk | Low risk | Low risk | Low risk | Low risk | Low risk |
