Table 3 The categories of risk of bias randomized clinical trials
Study | Randomization described | Allocation concealment reported | Intent to treat analysis performed | Blinded assessment stated | A priori power calculation performed | Total points | Risk of bias |
Monini [9] | 1 | 0 | 0.5 | 0.5 | 1 | 3 | Low |
Mezomo [3] | 1 | 1 | 0 | 0.5 | 0 | 2.5 | Moderate |
Cohort studies | |||||||
Study | Representative sample of adequate size | Well matched sample | Adjusting for confounders | Blinded assessment stated | Reporting drop-outs | Total points | Risk of bias |
Burrow [5] | 1 | 1 | 0.5 | 0 | 0 | 2.5 | Moderate |
de Almeida [8] | 1 | 1 | 0.5 | 0 | 0 | 2.5 | Moderate |
Machibya [7] | 1 | 1 | 0.5 | 0 | 0 | 2.5 | Moderate |
Oz 2012 [4] | 0.5 | 1 | 0.5 | 0 | 0 | 2 | Moderate |