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Table 2 Prevalence of emphysema on chest films and HRCT

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

Variables

Number

Chest films

HRCT

N (%)

p-value

N (%)

p-value

Group

LEG

317

29 (9.1)

0.017

36 (11.4)

0.007

MEG

1,046

150 (14.3)

 

186 (17.8)

 

Sex

Female

849

69 (8.1)

0.000

84 (9.9)

0.000

Male

514

110 (21.4)

 

138 (26.8)

 

Age

≤59

395

20 (5.1)

0.000

24 (6.1)

0.000

60–69

410

46 (11.2)

 

59 (14.4)

 

≥70

558

113 (20.3)

 

139 (24.9)

 

BMI

≥25.0

562

32 (5.7)

0.000

50 (8.9)

0.000

24.9–20.0

689

96 (13.9)

 

125 (18.1)

 

≤19.9

112

51 (45.5)

 

47 (42.0)

 

Residency period

≤24

389

24 (6.2)

0.000

44 (11.3)

0.002

≥25

974

155 (15.9)

 

178 (18.3)

 

Smoking

Never

929

81 (8.7)

0.000

99 (10.7)

0.000

≤29

206

33 (16.0)

 

42 (20.4)

 

≥30

228

65 (28.5)

 

81 (35.5)

 

Firewood

Not use

684

71 (10.4)

0.003

94 (13.7)

0.011

Use

679

108 (15.9)

 

128 (18.9)

 

Income

≥100

437

33 (7.6)

0.000

48 (11.0)

0.000

≤99

926

146 (15.8)

 

174 (18.8)

 
  1. P-value by chi-square test
  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 (Korean)/month
  5. Chest films; Chest PA and Lateral view, HRCT; High-resolution computed tomography