| Ref ID | 343 |
| First Author | N. Konsgen |
| Journal | JOURNAL OF CLINICAL EPIDEMIOLOGY |
| Year Of Publishing | 2020 |
| URL | https://www.jclinepi.com/article/S0895-4356(19)30647-X/fulltext |
| Keywords |
• General medical • Risk of bias • Cochrane |
| Problem(s) |
• Flawed risk of bias undertaken • Weaknesses identified in some Cochrane reviews |
| Article Type | Empirical |
| Article Subtype | Cross-sectional survey/Methodological systematic review |
| First Author Country | Germany |
| Aim | To assess the level of agreement between Cochrane reviews of overlapping randomised controlled trials regarding risk-of-bias judgments for Cochrane reviews of tobacco up to November 2017. |
| Level of Investigation | Descriptive |
| Summary of Findings | The level of agreement between Cochrane reviews which included overlapping randomised controlled trials regarding risk of bias judgments ranged from slight to substantial depending on the risk of bias domain: ‘‘allocation concealment’’: kappa = 0.51 (0.41 to 0.61), kappa = 0.75; ‘‘blinding’’: kappa = 0.19 (0.02 to 0.37), kappa = 0.52; ‘‘blinding of outcome assessment’’: kappa = 0.43 (0.14 to 0.72) kappa = 0.67; and ‘‘incomplete outcome data’’: kappa = 0.15 (-0.03 to 0.32), kappa = 0.64. For ‘‘blinding of participants and personnel’’ and ‘‘selective reporting’’, kappa could not be calculated. The raw agreement was 0.40 and 0.42, respectively. |
| Number of systematic reviews included | 53 |
| Number of eligible systematic reviews assessed | 71 |
| Treatment impacted | No |
| Treatment impacted description | |
| Interpretation impacted | Not Applicable |
| Interpretation impacted description |