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Table 2 Correlation between control status criteria at Week 12

From: Validation of a guideline-based composite outcome assessment tool for asthma control

 

β2 use

PEF

N-T awake

Exac.

EV

AE

Well controlled

      

Symptoms

0.52

0.23

0.37

0.13

0.13

0.05

β2 use

 

0.28

0.46

0.13

0.11

0.03

PEF

  

0.24

0.10

0.08

0.04

N-T awake

   

0.12

0.09

0.04

Exac.

    

0.49

0.13

EV

     

0.18

Totally controlled

      

Symptoms

0.68

0.25

0.38

0.09

0.08

0.01

β2 use

 

0.26

0.45

0.10

0.09

0.01

PEF

  

0.24

0.10

0.08

0.04

N-T awake

   

0.12

0.09

0.04

Exac.

    

0.49

0.13

EV

     

0.18

  1. Symptoms = Daytime symptoms; β2 use = Use of rescue β2-agonist; PEF = Peak expiratory flow rate; N-T awake = Night time awakening; Exac. = exacerbations; EV = Emergency visits; AE = Treatment-related adverse events.