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Table 1 Correlations between VAS and asthma diary items

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

  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***
  1. *** p = <.0001