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Table 5 Cross-sectional validity for individuals with an exacerbation of asthma at the follow-up survey* (n = 143)

From: Comparing a disease-specific and a generic health-related quality of life instrument in subjects with asthma from the general population

Instrument AQLQ        
Validation measure Activity limitation Symptoms Emotional function Environmental exposure     
Severity of asthma -0.27 -0.34 -0.33 -0.28     
Respiratory symptoms -0.49 -0.62 -0.43 -0.52     
Exercise limitation -0.32 -0.39 -0.32 -0.30     
Professional or leisure limitation due to asthma? -0.34 -0.34 -0.24 -0.30     
Depression -0.21 -0.13 -0.09 -0.15     
Smoking  
   Current -0.05 -0.10 -0.08 -0.13  
   Current or former -0.08 -0.21 -0.14 -0.14     
FEV 1 (% of predicted value) 0.34 0.27 0.34 0.29     
FEF 25–75 (% of predicted value) 0.24 0.12 0.21 0.18     
  SF-36        
  Physical functioning Role physical Bodily pain General health Vitality Social functioning Role emotional Mental health
Severity of asthma -0.24 -0.25 -0.18 -0.25 -0.03 -0.16 -0.12 -0.12
Respiratory symptoms -0.38 -0.29 -0.31 -0.26 -0.30 -0.20 -0.20 -0.29
Exercise limitation -0.42 -0.20 -0.19 -0.16 -0.27 -0.10 -0.11 -0.18
Professional or leisure limitation due to asthma? -0.34 -0.38 -0.28 -0.32 -0.19 -0.20 -0.22 -0.15
Depression -0.26 -0.25 -0.33 -0.38 -0.27 -0.38 -0.35 -0.25
Smoking  
   Current 0.00 0.02 -0.11 0.01 0.03 0.04 0.09 0.04
   Current or former -0.11 -0.12 -0.23 0.11 -0.14 -0.12 -0.01 0.03
FEV 1 (% of predicted value) 0.57 0.32 0.18 0.12 0.06 0.18 0.21 0.05
FEF 25–75 (% of predicted value) 0.48 0.33 0.30 0.09 0.06 0.21 0.23 0.03
  1. * Selection criteria are described in the Methods section