Table 2.

Respiratory function measured in awake, resting, mice at ~8 mo of chronic exposure

	Groups			P Value (ANOVA)
	Air (n = 13)	E-cig (n = 11)	3R4F (n = 13)
Frequency, breaths/min	384 ± 10	408 ± 10	384 ± 9	0.15
Tidal volume, ml	0.72 ± 0.08	0.70 ± 0.04	0.59 ± 0.05	0.26
Minute ventilation, ml/min	271 ± 28	281 ± 12	223 ± 18	0.12
Peak inspiratory flow	16.8 ± 1.4	18.1 ± 0.8	15.0 ± 0.8	0.14
Peak expiratory flow	17.4 ± 0.6	18.6 ± 0.9	15.5 ± 1.2	0.08

Values are means ± SE.