Age group (years) | | | | <0.001 |
40–49 | 321 (32.6) | 360 (43.7) | 681 (37.6) | |
50–59 | 239 (24.3) | 222 (26.9) | 461 (25.5) | |
60–69 | 276 (28.0) | 168 (20.4) | 444 (24.5) | |
⩾70 | 149 (15.1) | 74 (9.0) | 223 (12.3) | |
Education (years) | | | | <0.001 |
0 | 126 (12.8) | 706 (85.7) | 832 (46.0) | |
1–6 | 330 (33.5) | 109 (13.2) | 439 (24.3) | |
⩾7 | 529 (53.7) | 9 (1.1) | 538 (29.7) | |
ETS | | | | <0.001 |
No | 440 (44.7) | 188 (22.8) | 628 (34.7) | |
Yes | 545 (55.3) | 636 (77.2) | 1181 (65.3) | |
Occupational exposure to dust | | | | <0.001 |
Yes | 244 (24.8) | 812 (98.5) | 1056 (58.4) | |
No | 741 (75.2) | 12 (1.5) | 753 (41.6) | |
Respiratory disease in family | | | | 0.097 |
Yes | 185 (18.8) | 174 (21.1) | 359 (19.8) | |
No | 800 (81.2) | 650 (78.9) | 1450 (80.2) | |
Cough in childhood | | | | <0.001 |
Often/sometimes | 70 (7.1) | 11 (1.3) | 81 (4.5) | |
Seldom | 915 (92.9) | 813 (98.7) | 1728 (95.5) | |
BMI (kg/m2) | | | | 0.005 |
<18.5 | 67 (6.8) | 33 (4.0) | 100 (5.5) | |
18.5–23.9 | 539 (54.7) | 537 (65.2) | 1076 (59.5) | |
⩾24.0 | 379 (38.5) | 254 (30.8) | 633 (35.0) | |
Life quality | | | | <0.001 |
Poor | 44 (4.5) | 247 (30.0) | 291 (16.1) | |
General | 815 (82.7) | 558 (67.7) | 1373 (75.9) | |
Good | 126 (12.8) | 19 (2.3) | 145 (8.0) | |
Fuel type | | | | <0.001 |
LPG | 974 (98.9) | 1 (0.1) | 975 (53.9) | |
Coal | 8 (0.8) | 82 (10.0) | 90 (5.0) | |
Biomass | 3 (0.3) | 741 (89.9) | 744 (41.1) | |
Local exhaust ventilation in kitchen | | | | <0.001 |
Yes | 888 (90.2) | 6 (0.7) | 894 (49.4) | |
No | 97 (9.8) | 818 (99.3) | 915 (50.6) | |