Table 3– Other putative determinants which showed a (near) significant (p<0.1) association with electronically measured adherence over 3-month period

	Rank correlation coefficient		Comparison between children with high (>80%) and low adherence (<80%) of prescribed dosages taken
	ρ	p-value	p-value
MARS	0.53	<0.001	0.001
VAS asthma control by physician	0.26	0.028	0.009
ACQ at 3 months	-0.19	0.105	0.036
R_rs,int baseline^#	-0.33	0.060	0.045
R_rs,int % change after bronchodilator^#	0.41	0.016	0.006
FEV₁ change after bronchodilator^#	-0.33	0.069	0.085

MARS: Medication Adherence Report Scale; VAS: visual analogue scale; ACQ: Asthma Control Questionnaire [20]; R_rs,int: resistance of the respiratory system measured by the interrupter technique; FEV₁: forced expiratory volume in 1 s before and after salbutamol. ^#: n=33.