Grading of Recommendations Assessment, Development and Evaluation Evidence Profile: N95/Surgical Mask Compared With No Personal Protective Equipment (No Mask) or Infrequent PPE (Inconsistent Use of Mask)
| Certainty Assessment . | . | . | . | . | . | . | No. of Patients . | . | Effect . | . | Certainty . |
|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Studies . | Study Design . | Risk of Bias . | Inconsistency . | Indirectness . | Imprecision . | Other Considerations . | N95 . | No Personal Protective Equipment . | Relative (95% CI) . | Absolute (95% CI) . | . |
| Severe acute respiratory syndrome infection | |||||||||||
| 5 [20–24] | Observational | Not serious | Not serious | Not serious a | Not serious | Strong association b | 9/163 (5.5%) | 86/234 (36.8%) | Odds ratio 0.12 (.06 –.26) | 302 fewer per 1000 (from 334 fewer to 236 fewer) | ⨁⨁⨁◯ Moderate |
| Certainty Assessment . | . | . | . | . | . | . | No. of Patients . | . | Effect . | . | Certainty . |
|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Studies . | Study Design . | Risk of Bias . | Inconsistency . | Indirectness . | Imprecision . | Other Considerations . | N95 . | No Personal Protective Equipment . | Relative (95% CI) . | Absolute (95% CI) . | . |
| Severe acute respiratory syndrome infection | |||||||||||
| 5 [20–24] | Observational | Not serious | Not serious | Not serious a | Not serious | Strong association b | 9/163 (5.5%) | 86/234 (36.8%) | Odds ratio 0.12 (.06 –.26) | 302 fewer per 1000 (from 334 fewer to 236 fewer) | ⨁⨁⨁◯ Moderate |
Abbreviation: CI, confidence interval.
aAlthough the studies reported on the severe acute respiratory syndrome outbreak, given the similarities between severe acute respiratory syndrome coronavirus 1 and severe acute respiratory syndrome coronavirus 2, we did not rate down for indirectness.
bThe evidence was rated up for large magnitude of effect.
Grading of Recommendations Assessment, Development and Evaluation Evidence Profile: N95/Surgical Mask Compared With No Personal Protective Equipment (No Mask) or Infrequent PPE (Inconsistent Use of Mask)
| Certainty Assessment . | . | . | . | . | . | . | No. of Patients . | . | Effect . | . | Certainty . |
|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Studies . | Study Design . | Risk of Bias . | Inconsistency . | Indirectness . | Imprecision . | Other Considerations . | N95 . | No Personal Protective Equipment . | Relative (95% CI) . | Absolute (95% CI) . | . |
| Severe acute respiratory syndrome infection | |||||||||||
| 5 [20–24] | Observational | Not serious | Not serious | Not serious a | Not serious | Strong association b | 9/163 (5.5%) | 86/234 (36.8%) | Odds ratio 0.12 (.06 –.26) | 302 fewer per 1000 (from 334 fewer to 236 fewer) | ⨁⨁⨁◯ Moderate |
| Certainty Assessment . | . | . | . | . | . | . | No. of Patients . | . | Effect . | . | Certainty . |
|---|---|---|---|---|---|---|---|---|---|---|---|
| No. of Studies . | Study Design . | Risk of Bias . | Inconsistency . | Indirectness . | Imprecision . | Other Considerations . | N95 . | No Personal Protective Equipment . | Relative (95% CI) . | Absolute (95% CI) . | . |
| Severe acute respiratory syndrome infection | |||||||||||
| 5 [20–24] | Observational | Not serious | Not serious | Not serious a | Not serious | Strong association b | 9/163 (5.5%) | 86/234 (36.8%) | Odds ratio 0.12 (.06 –.26) | 302 fewer per 1000 (from 334 fewer to 236 fewer) | ⨁⨁⨁◯ Moderate |
Abbreviation: CI, confidence interval.
aAlthough the studies reported on the severe acute respiratory syndrome outbreak, given the similarities between severe acute respiratory syndrome coronavirus 1 and severe acute respiratory syndrome coronavirus 2, we did not rate down for indirectness.
bThe evidence was rated up for large magnitude of effect.
This PDF is available to Subscribers Only
View Article Abstract & Purchase OptionsFor full access to this pdf, sign in to an existing account, or purchase an annual subscription.
