TABLE III.

Pairwise Comparisons of P_total for Challenge Aerosol Types (ANOVA with Post-hoc Pair-wise Comparisons)

Aerosol type	Aerosol type	Estimate	SE	DF	T-value	p-value
NaCl	Wood	−0.40	0.096	32	−4.16	0.0013
NaCl	Paper	−0.72	0.096	32	−7.54	< 0.0001
NaCl	Plastic	−1.11	0.096	32	−11.60	< 0.0001
Paper	Plastic	−0.39	0.096	32	−4.06	0.0018
Paper	Wood	0.32	0.096	32	3.37	0.0117
Plastic	Wood	0.71	0.096	32	7.44	< 0.0001

Estimate: the difference in mean penetration values between the selected two materials; SE: standard error; DF: degree of freedom