Table 2. Data of laboratory-confirmed other respiratory viruses in medical masks vs. N95 groups.
| Parameter | No. of studies | Number of cases | RR (95%CI) | P-value | I2 statistic | |
|---|---|---|---|---|---|---|
| Medical masks | N95 | |||||
| Respiratory syncytial virus | 2 | 2/306 (0.7%) | 1/302 (0.3%) | 1.98 (0.18, 21.68) | 0.58 | NA |
| Metapneumovirus | 2 | 4/306 (1.3%) | 3/302 (1.0%) | 1.32 (0.30, 5.83) | 0.71 | NA |
| Parainfluenza virus | 2 | 2/306 (0.7%) | 2/302 (0.7%) | 0.99 (0.17, 5.67) | 0.99 | 0% |
| Rhinovirus-enterovirus | 2 | 11/306 (3.6%) | 12/302 (4.0%) | 0.91 (0.41, 2.02) | 0.81 | 0% |
| Coronavirus | 2 | 9/306 (2.9%) | 12/302 (4.0%) | 0.74 (0.32, 1.73) | 0.49 | NA |
| Adenoviruses | 1 | 0/94 (0.0%) | 2/92 (2.2%) | 0.20 (0.01, 4.02) | 0.29 | NA |
| Picornoviruses | 1 | 0/94 (0.0%) | 1/92 (1.1%) | 0.33 (0.01, 7.91) | 0.49 | NA |
RR = Risk Ratio; CI = Confidence Interval; NA = Not applicable.