Table 3 Measurements before and 20 min after placebo in children with asthma

	Asthmatic children
	Pre-placebo	Post-placebo	p Value (post-placebo vs pre-placebo)
Mean (SD) FEV₁ z-score	−1.036 (1.14)	−0.97 (1.17)	0.45
Mean (SD) LCI	6.69 (1.01)	6.71 (1.23)	0.83
Mean (SD) S_cond	0.033 (0.03)	0.033 (0.02)	0.90
Mean (SD) S_acin	0.14 (0.09)	0.16 (0.12)	0.46

FEV₁, forced expiratory volume in 1 s; LCI, lung clearance index; S_acin, S_cond, phase III (alveolar) slope of the acinar and conductive airways, respectively.