Table 3. Comparison of spirometry results between the study and control groups.

	Treatment group (n=41)	Placebo/control group (n=40)	P value	95% confidence interval of the difference
				Lower	Upper
Forced expiratory volume in 1 s (FEV1) in liters
Basal	2.2±0.30	2.1±0.36	0.15	−0.25	0.04
1 h	1.6±0.43	1.3±0.40	0.003	−0.46	−0.09
6 h	1.7±0.37	1.5±0.45	0.02	−0.10	−0.04
12 h	1.8±0.38	1.4±0.52	0.001	−0.58	−0.17
24 h	2.1±0.60	1.7±0.49	0.001	−0.60	−0.12
Forced vital capacity (FVC) in liters
Basal	2.3±0.32	2.2±0.52	0.25	−0.30	0.80
1 h	2.0±0.36	1.5±0.55	0.001	−0.70	−0.28
6 h	2.1±0.36	1.5±0.36	0.001	−0.73	−0.41
12 h	2.0±0.35	1.7±0.45	0.001	−0.57	−0.21
24 h	2.2±0.58	1.8±0.60	0.004	−0.66	−0.13
Peak expiratory flow (PEF) in liters
Basal	4.0±1.7	3.8±1.3	0.64	−0.81	0.50
1 h	3.0±1.3	2.1±0.72	0.001	−1.04	0.43
6 h	3.4±1.5	2.1±1.3	0.001	−1.8	−0.53
12 h	3.6±1.1	2.7±1.24	0.03	−1.1	−0.06
24 h	4.1±1.5	3.0±1.4	0.001	−1.8	−0.54
Ratio of FEV1 to FVC (FEV1/FVC) in percentage
Basal	89.4±5.7	90.3±5.8	0.51	−1.70	3.40
1 h	88.0±6.5	82.0±4.9	0.001	−8.5	3.5
6 h	88.5±6.3	83.0±11.4	0.01	−9.6	−1.42
12 h	88.1±5.2	86.0±6.4	0.08	−4.85	0.29
24 h	89.0±4.1	90.0±6.8	0.20	−0.83	4.13
Oxygen saturation in percentage (O2)
Basal	97.4±2.0	97.3±1.8	0.96	−0.88	0.84
1 h	96.0±2.4	96.0±1.6	0.52	−0.61	1.20
6 h	96.0±2.0	94.8±2.2	0.09	−2.23	0.12
12 h	96.4±1.9	95.2±2.8	0.03	−2.14	−0.90
24 h	97.0±2.0	96.1±2.5	0.18	−1.69	0.33

Values are expressed as means ± standard deviation.