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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%.