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Table 4 Crude and adjusted odds ratios for COPD (FEV1/FVC<LLN)

From: Altitude and COPD prevalence: analysis of the PREPOCOL-PLATINO-BOLD-EPI-SCAN study

Variable

OR (crude) (95% CI)

p-value

OR (multivariate model) (95% CI)

p-value

Altitude

<1500

1

 

1

 

>1500

0.85 (0.75; 0.95)

0.005

0.90 (0.80; 1.02)

0.111

Sex

Male

1

 

1

 

Female

0.73 (0.68; 0.79)

<0.001

0.94 (0.86; 1.02)

0.119

Age in years

1.04 (1.04; 1.04)

<0.001

1.05 (1.04; 1.05)

<0.001

Years of education

>12

1

 

1

 

9–12

1.24 (1.11; 1.39)

<0.001

1.16 (1.03; 1.30)

0.015

<9

1.48 (1.33; 1.64)

<0.001

1.24 (1.12; 1.39)

<0.001

Smoking status

Never

1

 

1

 

Former

1.97 (1.79; 2.16)

<0.001

1.78 (1.61; 1.97)

<0.001

Current

2.78 (2.53; 3.05)

<0.001

3.40 (3.08; 3.76)

<0.001

Dusty job

 

1.37 (1.27; 1.48)

<0.001

1.18 (1.09; 1.29)

<0.001