Table 1.

TV, PEF, and EF50 in three experimental rat groups ($\overline{\mathrm{x}}\pm S$).

Index	Group	0 weeks	4 weeks	8 weeks	12 weeks	16 weeks	20 weeks
TV (mL)	Control	2.86 ± 0.46	2.88 ± 0.33	2.89 ± 0.34	2.90 ± 0.32	2.91 ± 0.36	2.92 ± 0.24
	COPD	2.90 ± 0.38	2.49 ± 0.24	2.06 ± 0.22	1.93 ± 0.22	1.92 ± 0.30	1.89 ± 0.36
	BYF	2.97 ± 0.46	2.52 ± 0.21	2.04 ± 0.33	2.11 ± 0.18	2.14 ± 0.25	2.22 ± 0.36
PEF (mL/s)	Control	14.43 ± 2.69	14.72 ± 2.48	15.16 ± 1.99	15.25 ± 2.02	15.31 ± 1.75	15.30 ± 2.24
	COPD	14.11 ± 2.47	11.28 ± 2.00	9.99 ± 2.33	9.90 ± 1.96	9.93 ± 2.40	10.02 ± 2.18
	BYF	14.49 ± 2.53	11.78 ± 1.96	10.03 ± 2.48	11.15 ± 2.51	11.81 ± 2.61	12.35 ± 2.84
EF50 (mL/s)	Control	1.72 ± 0.16	1.76 ± 0.12	1.75 ± 0.15	1.81 ± 0.17	1.93 ± 0.28	1.97 ± 0.21
	COPD	1.73 ± 0.11	1.49 ± 0.13	1.02 ± 0.17	0.96 ± 0.20	0.99 ± 0.17	1.05 ± 0.17
	BYF	1.71 ± 0.12	1.47 ± 0.20	1.05 ± 0.20	1.11 ± 0.22	1.17 ± 0.28	1.24 ± 0.28