Visual analogue scale (VAS) as a monitoring tool for daily changes in asthma symptoms in adolescents: a prospective study

Table 1 Correlations between VAS and asthma diary items

	VAS-am	VAS-pm
Morning diary items
Nocturnal wakening	0.45***
Morning symptoms	0.55***
Evening diary items
Activity limitation		0.41***
Shortness of breath		0.52***
Wheezing		0.58***
Short acting beta agonist use		0.42***

ISSN: 1710-1492