Table 3. Relationship between inspiratory volume through the EH and age, height, weight and lung function in the PP population (N=383).

Parameter	Patients 6–17 years of age with asthma (n=102)			Patients ≥18 years of age with asthma (n=185)			Patients with COPD (n=96)
	r*	P value		r*	P value		r*	P value
Age, years	0.627	<0.0001		−0.314	<0.0001		−0.051	0.6240
Height, cm	0.710	<0.0001		0.475	<0.0001		0.478	<0.0001
Weight, kg	0.714	<0.0001		0.203	0.0057		0.166	0.1069
FEV1, L	0.718	<0.0001		0.549	<0.0001		0.623	<0.0001
FEV1, % predicted	−0.004	0.9667		0.257	0.0004		0.384	0.0001
FVC, L	0.804	<0.0001		0.668	<0.0001		0.723	<0.0001
FVC, % predicted	0.178	0.0728		0.407	<0.0001		0.408	<0.0001
Native PIF, L/s	0.455	<0.0001		0.588	<0.0001		0.524	<0.0001
PIF via inhaler, L/min	0.499	<0.0001		0.612	<0.0001		0.632	<0.0001
PEF, L/s	0.534	<0.0001		0.485	<0.0001		0.574	<0.0001

*, Pearson’s correlation coefficient. COPD, chronic obstructive pulmonary disease; EH, Easyhaler; FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity; PEF, peak expiratory flow; PIF, peak inspiratory flow; PP, per-protocol.