Table 2 Variables associated with the diagnosis of COPD in the development cohort

From: An accurate prediction model to identify undiagnosed at-risk patients with COPD: a cross-sectional case-finding study

 

Univariate

Multivariate

β

Odds ratio

95% CI

P a

β

Odds ratio

95% CI

P a

Age, years

0.055

1.06

1.04–1.08

<0.001

0.045

1.05

1.02–1.07

<0.001

Sex, male

− 0.35

0.71

0.24–2.08

0.526

    

Current smoker

− 0.355

0.7

0.44–1.11

0.129

    

Smoking pack-years

0.017

1.02

1.01–1.03

0.001

0.015

1.02

1.00–1.03

0.016

Best PEFR (L/min)

− 0.012

0.99

0.98–0.99

<0.001

    

Predicted PEFR (%)

− 0.056

0.95

0.93–0.96

<0.001

−0.049

0.95

0.94–0.97

<0.001

CAT score

Total

0.103

1.11

1.06–1.16

<0.001

0.056

1.06

1.00–1.12

0.037

Cough

0.213

1.24

1.05–1.46

0.012

    

Phlegm

0.282

1.33

1.12–1.57

0.001

    

Chest tightness

0.289

1.34

1.11–1.61

0.003

    

Breathlessness

0.469

1.6

1.33–1.92

<0.001

    

Activity limitation

0.447

1.56

1.24–1.97

<0.001

    

Confidence

0.506

1.66

1.21–2.28

0.002

    

Sleep

0.154

1.17

0.96–1.41

0.116

    

Energy

0.416

1.52

1.23–1.86

<0.001

    
  1. β regression coefficient, CAT COPD assessment test, CI confidence interval, COPD chronic obstructive pulmonary disease, PEFR peak expiratory flow rate
  2. aWald test in Binary logistic regression
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