Table 2.

Comparison of lung function indicators between 2 groups.

Time	Group	FVC (L)	MMEF (L/s)	PEF (L/min)	FEV1 (L)
Before treatment	Observation-group (n = 59)	2.5 (2.2, 2.6)	1.2 (1.1, 1.3)	346 (336, 358)	1.6 (1.5, 1.7)
	Control-group (n = 59)	2.6 (2.3, 2.7)	1.3 (1.1, 1.3)	354 (325, 369)	1.6 (1.3, 1.7)
	Z	−1.784	−1.679	−1.070	−1.077
	P value	.074	.093	.285	.282
After treatment	Observation-group (n = 59)	3.20 ± 0.41*	2.8 (2.5, 3.0)*	476 (462, 488)*	2.69 ± 0.41*
	Control-group (n = 59)	2.81 ± 0.39*	2.5 (2.2, 2.6)*	440 (412, 458)*	2.30 ± 0.38*
	t/Z	5.294	−5.140	−4.963	−4.237
	P value	<.001	<.001	<.001	<.001

Compared with before treatment in this group

^*p < 0.05.

FEV1 = forced expiratory volume in the first second, FVC = forced vital capacity, MMEF = maximum mid-expiratory flow, PEF = peak expiratory flow.