Table 4 Concentration of bacterial bioaerosols in different mask sampling modes (CFU/m3).

From: The effect of medical face masks on inhalation risk of bacterial bioaerosols in hospital waste decontamination station

Bacterial bioaerosols concentration

Regression Coefficient

P-value

Mean (SD)

Median (IQR)

P-value of Shapiro–Wilk test

Without mask

Reference

360.574 (515.87)

217.093 (230.174)

 < 0.001

3-layer mask

-210.257 (-296.548 , -123.965)

 < 0.001

18.719 (22.365)

13.675 (13.27)

 < 0.001

N95 mask

-210.604 (-297.465 , -123.742)

 < 0.001

25.064 (46.773)

13.237 (27.364)

 < 0.001

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