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Table 4 Comorbidities associated with the score of each CAT item on stepwise multivariate regression analysis

From: Analysis of comorbid factors that increase the COPD assessment test scores

CAT item

Comorbidity

p value

Cumulative R2

Cough

   
 

None

  

Phlegm

   
 

None

  

Chest tightness

   
 

GERD (FSSG ≥ 8)

<0.001

0.0901

 

Depression (HAD-D ≥ 11)

0.0033

0.123

Breathlessness

   
 

GERD (FSSG ≥ 8)

<0.001

0.0705

 

Osteoporosis

0.0355

0.0876

Activity limitation

   
 

GERD (FSSG ≥ 8)

<0.001

0.0926

 

Depression (HAD-D ≥ 11)

<0.001

0.1452

 

Arrhythmia

0.0026

0.1773

 

Osteoporosis

0.0222

0.1954

Confidence to leave home

   
 

GERD (FSSG ≥ 8)

<0.001

0.0631

 

Depression (HAD-D ≥ 11)

<0.001

0.107

 

Osteoporosis

<0.001

0.1337

 

Hypertension

0.0109

0.1571

 

Arrhythmia

0.0445

0.1714

Sleep

   
 

Depression (HAD-D ≥ 11)

<0.001

0.0807

 

GERD (FSSG ≥ 8)

0.0033

0.1134

 

Anxiety (HAD-A ≥ 11)

0.01

0.1378

 

Arrhythmia

0.0404

0.153

Energy

   
 

GERD (FSSG ≥ 8)

<0.001

0.1191

 

Depression (HAD-D ≥ 11)

<0.001

0.1972

 

Arrhythmia

<0.001

0.2487

 

Anxiety (HAD-A ≥ 11)

0.0333

0.263

  1. Abbreviations are the same as those in Table 3.