Table 1.
Quality Assessment of the selected studies for systemic review and meta-analysis.
| Criteria | Unsatisfactory | Satisfactory | Good |
|---|---|---|---|
| Sample size | Less than ten samples | 10–100 samples | >100 samples |
| Cox regression analysis | Only P value is given | Only multivariate analysis with HR, CI, and P value | Both univariate and multivariate analysis |
| Survival | Only DFS | OS, DFS | OS, DFS, RFS |
| miRNAs regulation | No significant upregulation or downregulation | At least one miRNA upregulated or downregulated | >1 miRNA upregulated or downregulated |
| Total studies | 0 | 12 | 15 |
DFS: disease-free survival; OS: overall survival; RFS: recurrence-free survival; HR: hazard ratio; CI: confidence interval; miRNA: microRNA.