Table 2.
Manuscripts With High and Low Levels of Evidence, Average PRISMA Scores, and Average AMSTAR Scores (in Percentages) by Year
| 2015 | 2016 | 2017 | 2018 | 2019 | Total '09-'13 | Total '15-'19 | |
|---|---|---|---|---|---|---|---|
| Total number of manuscripts | 109 | 116 | 85 | 97 | 109 | 200 | 516 |
| High level of evidence∗ | 20 (18%) | 18 (17%) | 13 (15%) | 20 (21%) | 17 (16%) | 63 (31.5%) | 88 (17.1%) |
| Low level of evidence∗ | 84 (77%) | 95 (82%) | 68 (80%) | 71 (73%) | 90 (83%) | 108 (54.0%) | 408 (79.1%) |
| PRISMA score, average | 76 | 79 | 81 | 84 | 82 | 87 | 80 |
| AMSTAR score, average | 53 | 59 | 58 | 63 | 61 | 73 | 59 |
AMSTAR, Assessment of Multiple Systematic Reviews; PRISMA, Preferred Reporting Items for Systematic Reviews and Meta-Analyses.
∗
Data presented as: number of manuscripts (percentage of manuscripts).