Table 5.
Grade quality of evidence ratings
| Certainty assessment |
Summary of findings |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Study number | Study design | Risk of bias | Inconsistency | Indirectness | Imprecision | Other considerations | Number of patients |
Effect |
|||
| CC with AVF device | Standard manual CC | Relative (95% CI) | Absolute (95% CI) | Certainty | |||||||
| Sustained ROSC | |||||||||||
| 4 | RCT | Not serious | Seriousa | Not serious | Not serious | None | 351/530 (66.2%) | 217/534 (40.6%) | RR 1.68 (1.39-2.04) | 276 more per 1000 (from 158 more to 423 more) | ⨁⨁⨁◯ Moderate |
| Survival to ICU discharge | |||||||||||
| 2 | RCT | Not serious | Seriousa | Not serious | Not serious | None | 278/461 (60.3%) | 156/461 (33.8%) | RR 1.78 (1.54-2.06) | 264 more per 1000 (from 189 more to 359 more) | ⨁⨁⨁◯ Moderate |
| Survival to hospital discharge | |||||||||||
| 3 | RCT | Not serious | Seriousa | Not serious | Not serious | None | 253/490 (51.6%) | 132/494 (26.7%) | RR 1.91 (1.62-2.25) | 243 more per 1000 (from 166 more to 334 more) | ⨁⨁⨁◯ Moderate |
aRisk of bias due to lack of blinding. CC: Chest compressions; AVF: Audiovisual feedback; ROSC: Return of spontaneous circulation; RCT: Randomized controlled trial; CI: Confidence interval; RR: Relative risk