Table 3.
Median Colony-Forming Units by Sampling Method Isolated From Volunteers Coughing When Wearing a Surgical Mask, a Homemade Mask, and No Mask
| Median Interquartile Range | |||||||
|---|---|---|---|---|---|---|---|
| Sampling Method | No Mask | Homemade Mask | P | ||||
| Air | 6.0 | (1.0, 26.5) | 1.0 | (0.5, 6.5) | .007 | ||
| Settle plates | 1.0 | (0.0, 3.0) | 1.0 | (0.0, 2.0) | .224 | ||
| Total | 2.0 | (0.0, 12.3) | 1.0 | (0.0, 3.0) | .004 | ||
| Median Interquartile Range | |||||||
| Sampling Method | No Mask | Surgical Mask | P | ||||
| Air | 6.0 | (1.0, 26.5) | 1.0 | (0.5, 3.0) | .002 | ||
| Settle plates | 1.0 | (0.0, 3.0) | 0.0 | (0.0, 0.0) | .002 | ||
| Total | 2.0 | (0.0, 12.3) | 0.0 | (0.0, 1.0) | <.001 | ||