Thoracic and respirable particle definitions for human health risk assessment

Table 3 Partitioning of breaths through the mouth and nose

		Sleeping	Sitting	Light	Heavy
				Exercise	Exercise
Adult Male	Normal Augmenter ^a	0, 1.00 ^d	0, 1.00	0, 1.00	0.52, 0.48
	Mouth-breather ^a	0.29, 0.71	0.36, 0.64	0.59, 0.41	0.66, 0.34
	Gradual Augmenter ^b	0.12, 0.88	0.13, 0.87	0.29, .071	0.54, 0.46
Adult Female	Normal Augmenter ^a	0, 1.00	0, 1.00	0, 1.00	0.50, 0.50
	Mouth-breather ^a	0.12, 0.88	0.23, 0.77	0.57, 0.43	0.65, 0.35
	Gradual Augmenter ^b	0, 1.00	0, 1.00	0.22, 0.78	0.59, 0.41
Child	Normal Augmenter ^a	0, 1.00	0, 1.00	0, 1.00	0.51, 0.49
	Mouth-breather ^a	0.29, 0.71	0.36, 0.64	0.59, 0.41	0.66, 0.34
	Gradual Augmenter ^c	0.29, 0.71	0.31, 0.69	0.51, 0.49	0.77, 0.23

^a From regression equations for oral breathing in Figure 1 of Niinimaa et al. [17]; ^b Data based on Table 2 and Figure 3 of Bennett et al. [20] for 22 individuals (11 M, 11 F; mean age, 22 yrs); ^c Data based on Table 2 and Figure 2 of Bennett et al. [19] for 12 children (9 M, 3 F; 6-10 yrs of age); ^d fraction inhaled through mouth, fraction inhaled through nose.

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