Table 2.

Survival Fraction as a Function of Irradiance (Irradiation Time was 20 Minutes).

Irradiance, mW/cm2	S. epidermidis			S. aureus
	Survival Fraction, N/N0	t	P	Survival Fraction, N/N0	t	P
0	1	–	–	1	–	–
0.68	0.138 ± 0.043	5.453	<0.001	0.510 ± 0.048	9.079	<0.001
1.07	0.139 ± 0.054	0.327	0.571	0.462 ± 0.043	2.907	0.003
2.47	0.075 ± 0.057	2.363	0.006	0.401 ± 0.025	0.772	0.052
5.27	0.042 ± 0.032	2.116	0.012	0.245 ± 0.021	2.213	0.011
7.30	0.021 ± 0.018	1.672	0.056	0.132 ± 0.021	1.625	0.062
F	2.514			2.963
P	0.006			0.002