Table 1. Before-and-After Comparison for Penetration and Resistance.

		Penetration		Resistance
Respirator	UVGI Dose (J/cm2)	Change (%)	p-value	Change (%)	p-value
3M 1860	0	−16%	0.0684	−0.1%	0.8979
	120	9%	0.1916	−0.4%	0.371
	240	47%	<.0001	−0.8%	0.0911
	470	2%	0.8485	0.6%	0.22
	710	50%	0.0003	1.0%	0.0251
	950	−8%	0.26	1.4%	0.0041
3M 9210	0	3%	0.8767	0.6%	0.5259
	120	0%	0.9845	0.0%	0.9807
	240	21%	0.1241	0.7%	0.4531
	470	60%	0.0079	4.6%	0.0002
	710	64%	0.0028	−2.2%	0.0355
	950	10%	0.5624	−5.4%	<.0001
Gerson 1730	0	−9%	0.0301	0.9%	0.041
	120	20%	0.0004	0.2%	0.5832
	240	26%	<.0001	−0.4%	0.2489
	470	35%	<.0001	−1.1%	0.0107
	710	0%	1	−2.8%	<.0001
	950	−3%	0.3772	−1.7%	0.0005
Kimberly-Clark 46727	0	−4%	0.3888	0.9%	0.2462
	120	9%	0.0236	−0.7%	0.3365
	240	5%	0.1293	−0.4%	0.5742
	470	27%	<.0001	−2.3%	0.0064
	710	25%	<.0001	−3.2%	0.0003
	950	23%	<.0001	−2.7%	0.0028

For the penetration, the change is shown as a fraction of the original value; for example, if the penetration was 4% before exposure and 5% after, the change is given in the table as 25%, not 1%.