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Table 3 Ventilation impairment of post-bronchodilator PFT

From: Ventilation impairment of residents around a cement plant

Variable

Number

Ventilation impairment

Type

p-value

Obstructive

Restrictive

Group

LEG

129

27 (20.9)

11 (8.5)

16 (12.4)

0.025

MEG

318

100 (31.3)

31 (9.7)

69 (21.6)

Sex

Female

273

52 (19.0)

8 (2.9)

44 (16.1)

0.000

Male

174

75 (43.1)

34 (19.5)

41 (23.6)

Age (yrs)

≤59

139

20 (14.4)

6 (4.3)

14 (10.1)

0.000

60 ~ 69

133

37 (27.8)

13.(9.8)

24 (18.0)

≥70

175

70 (40.0)

23 (13.1)

47 (26.9)

Residence period (yrs)

≤25

113

30 (26.5)

12(10.6)

18 (15.9)

0.632

>25

334

97 (29.1)

30 (9.0)

67 (20.1)

Occupation

None/Merchant

265

80 (30.2)

17 (6.4)

63 (23.8)

0.338

Farmer/Labor

182

47 (25.8)

25 (13.7)

22 (12.1)

Smoking history

Never

301

65 (21.6)

11 (3.7)

54 (17.9)

0.000

Current/ex smoking

146

62 (42.4)

31 (21.2)

31 (21.2)

Dust exposure occupational history

No

357

97 (27.2)

31 (8.7)

66 (18.5)

0.295

Yes

90

30 (33.3)

11 (12.2)

19 (21.1)

Firewood use history

No

213

60 (28.2)

20 (9.4)

40 (18.8)

0.917

Yes

234

67 (28.6)

22 (9.4)

45 (19.2)

  1. p-value on total ventilation impairment by Chi-square test, MEG: more exposed group, LEG: less exposed group.
  2. Ventilation impairment: Obstructive type: FEV1/FVC <0.7, Restrictive type: FEV1/FVC ≥0.7 & FVC% predicted <80%.