Aerosol generation during routine rhinologic surgeries and in-office procedures.

However, there was a highly significant difference in mean concentrations of 2.69 to 10.0 μm aerosols among groups ( H (2) = 12.09, P = .002) with the no mask condition associated with higher concentrations compared to both the surgical mask ( P = .004, U = 46.669) and the VENT mask ( P = 0.017, U = 42.041); there was no significant difference between the surgical mask and VENT mask ( P = 1.00, U = −4.628). 3.2.

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There was also no statistically significant difference in mean concentrations of 0.30 to 0.90 μm aerosols ( F [2, 436] = 2.49, P = .09) or 0.90 to 2.69 μm aerosols ( H (2) = 5.74, P = .06), though the latter was trending toward significance.

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