A comparison of outcome data for the medical mask arm with medical mask outcomes in previously published RCTs
| CRI N (%) | RR (95% CI) | ILI N (%) | RR (95% CI) | Laboratory-
confirmed viruses N (%) | RR (95% CI) | |
|---|---|---|---|---|---|---|
| Vietnam trial | 28/580 (4.83) | Ref | 1/580 (0.17) | Ref | 19/580 (3.28) | Ref |
| Published RCT China 18 | 33/492 (6.70) | 1.40 (0.85 to 2.26) | 3/492 (0.61) | 3.53 (0.37 to 33.89) | 13/492 (2.64) | 0.80 (0.40 to 1.62) |
| Published RCT China 29 | 98/572 (17.13) | 3.54 (2.37 to 5.31) | 4/572 (0.70) | 4.06 (0.45 to 36.18) | 19/572 (3.32) | 1.01 (0.54 to 1.89) |
Bold typeface indicates statistically significant. CRI, Clinical respiratory illness; ILI, influenza-like illness; RCT, randomised clinical trial; RR, relative risk.