Table 5 Baseline behavioral and clinical characteristics of obstructed patients

Weight status, mean (SD) kg

74.17 ± 14.18

74.16 ± 13.24

74.26 ± 13.19

74.15 ± 13.28

Body mass index (BMI)

 Mean (SD)

27.24 ± 4.52

27.71 ± 4.58

27.57 ± 4.56

27.71 ± 4.58

 Underweight (BMI < 20)—n (%)

74 (25.7%)

246 (3.2%)

24 (3.6%)

235 (3.2%)

 Healthy (20–25)—n (%)

130 (45.1%)

1860 (24.4%)

166 (24.9%)

1768 (24.4%)

 Overweight (25–30)—n (%)

71 (24.7%)

3420 (44.8%)

299 (44.8%)

3251 (44.9%)

 Obesity (> 30)—n (%)

75 (26%)

2100 (27.5%)

178 (26.7%)

1993 (27.5%)

Smoking status

 Current smoker

75 (26%)

1213 (15.8%)

159 (23.6%)

1129 (15.5%)

 Ex-smoker

30 (10.4%)

582 (7.6%)

56 (8.3%)

556 (7.6%)

 Never smoker

184 (63.7%)

5894 (76.7%)

458 (68.1%)

5620 (76.9%)

Pack-years

 1–10

51 (17.6%)

1171 (15.2%)

107 (15.9%)

1043 (14.3%)

 10–20

36 (12.4%)

377 (4.9%)

71 (10.5%)

372 (5.1%)

 > 20

18 (6.2%)

247 (3.2%)

37 (5.5%)

270 (3.7%)

Occupational status

 Housewife/unemployed/retired

133 (46%)

3972 (51.7%)

337 (50.1%)

3768 (51.6%)

 Employee

47 (16.3%)

1403 (18.2%)

119 (17.7%)

1331 (18.2%)

 Farmer/rancher/herder

21 (7.3%)

277 (3.6%)

33 (4.9%)

265 (3.6%)

 Carpet weaver/tailor/weaver

12 (4.2%)

301 (3.9%)

25 (3.7%)

288 (3.9%)

 Car driver/mechanic and oil change worker

20 (6.9%)

493 (6.4%)

41 (6.1%)

472 (6.5%)

 Building contractor/worker and builder

24 (8.3%)

448 (5.8%)

45 (6.7%)

427 (5.8%)

 Others

32 (11.1%)

795 (10.3%)

73 (10.8%)

754 (10.3%)

Fuels used

 Gas

147 (50.9%)

5051 (65.7%)

410 (60.9%)

4788 (65.5%)

 Oil/gasoline

88 (30.4%)

1713 (22.3%)

164 (24.4%)

1637 (22.4%)

 Wood/firewood/animal dung

54 (18.7%)

925 (12%)

99 (14.7%)

880 (12%)

Cooking area (kitchen Type)

 Closed kitchen inside the house

82 (28.4%)

1823 (23.7%)

174 (25.9%)

1731 (23.7%)

 Open kitchen inside the house

199 (68.9%)

5780 (75.2%)

483 (71.8%)

5496 (75.2%)

 Outside of the house

8 (2.8%)

86 (1.1%)

16 (2.4%)

78 (1.1%)

Kitchen ventilation status

 Ventilated

149 (51.6%)

4273 (55.6%)

360 (53.5%)

4062 (55.6%)

 Not ventilated

140 (48.4%)

3416 (44.4%)

313 (46.5%)

3243 (44.4%)

Symptoms

 Chronic cough

32 (11.1%)

1006 (14.9%)

79 (11.7%)

958 (14.6%)

 Chronic cough with phlegm

14 (45.2%)

480 (47.7%)

31 (41.9%)

463 (48%)

 Shortness of breath and Wheezing

15 (5.3%)

202 (2.7%)

27 (4.1%)

190 (2.6%)

Chronic lung disease (asthma, tuberculosis, emphysema and bronchitis)

13 (4.6%)

333 (4.4%)

27 (4.1%)

319 (4.4%)

History of asthma in childhood

51 (17.6%)

898 (13.3%)

109 (16.1%)

840 (12.8%)

family history of respiratory and pulmonary diseases

15 (5.2%)

296 (4.4%)

39 (5.7%)

272 (4.1%)