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Table 3 Odds ratio of emphysema prevalence on chest films and HRCT

From: Emphysema prevalence related air pollution caused by a cement plant

   Chest films HRCT
Variables Unadjusted Adjusted Unadjusted Adjusted
   OR (95 % CI) OR (95 % CI) OR (95 % CI) OR (95 % CI)
Group LEG 1    
MEG 1.66 (1.09-2.53) 2.92 (1.77-4.83) 1.69 (1.15-2.47) 2.56 (1.64-3.99)
Sex Female 1    
Male 3.08 (2.23-4.26) 2.38 (1.37-4.13) 3.34 (2.48-4.50) 2.49 (1.53-4.07)
Age ≤59 1    
60–69 2.37 (1.38-4.08) 1.81 (0.96-3.40) 2.60 (1.58-4.27) 2.61 (1.47-4.62)
≥70 4.76 (2.90-7.81) 3.36 (1.79-6.31) 5.13 (3.25-8.09) 5.43 (3.04-9.69)
BMI ≥25.0 1    
24.9–20.0 2.68 (1.76-4.07) 2.83 (1.82-4.40) 2.27 (1.60-3.21) 2.34 (1.61-3.39)
≤19.9 13.84 (8.27-23.12) 16.38 (9.11-29.45) 7.40 (4.60-11.9) 8.08 (4.70-13.88)
Residency period ≤24 1    
≥25 2.88 (1.84-4.50) 2.50 (1.50-4.18) 1.75 (1.23-2.50) 1.32 (0.87-1.99)
Smoking Never 1    
≤29 2.00 (1.29-3.09) 1.66 (0.92-3.06) 2.15 (1.44-3.20) 1.68 (0.98-2.90)
≥30 4.18 (2.89-6.03) 3.05 (1.68-5.52) 4.62 (3.28-6.50) 2.93 (1.72-4.98)
Firewood Not use 1    
Use 1.63 (1.19-2.25) 1.26 (0.82-1.93) 1.46 (1.09-1.95) 1.24 (0.85-1.82)
Income ≥100 1    
≤99 2.29 (1.54-3.41) 1.41 (0.84-2.36) 1.88 (1.33-2.64) 1.03 (0.65-1.62)
  1. Logistic regression with adjusted for all variables, CI: confidence interval
  2. MEG: ‘more exposed group’ who lived within the 1 km radius of the cement plant
  3. LEG: ‘less exposed group’ who lived 5 km or more away from the cement plant in not related to usually wind direction
  4. Age and Residency period: years, Body mass index (BMI); kg/m2, Smoking: pack-years, Income: ten thousand won (Korea)/month
  5. Chest films; Chest PA and Lateral view, HRCT; High-resolution computed tomography