Characteristic |
Sex | | | | |
Female | 4 (1) | 511 (2) | 50 (98) | 29 981 (99) |
Male | 477 (99) | 20 401 (98) | 1 (2) | 210 (1) |
Age |
<40 years | 72 (15) | 5620 (27) | 8 (16) | 9361 (31) |
40–49 years | 135 (28) | 5403 (26) | 11 (22) | 8617 (29) |
50–59 years | 124 (26) | 4844 (23) | 18 (35) | 7211 (24) |
⩾60 years | 150 (31) | 5045 (24) | 14 (28) | 5002 (17) |
Education |
<High school | 46 (10) | 1856 (9) | 3 (7) | 1472 (6) |
High school | 228 (49) | 9853 (48) | 20 (46) | 10 879 (40) |
>High school | 196 (42) | 8756 (43) | 21 (48) | 14 658 (54) |
State |
Iowa | 449 (93) | 13 882 (66) | 45 (88) | 20 771 (69) |
North Carolina | 32 (7) | 7030 (34) | 6 (12) | 9420 (31) |
Smoking status |
Never smoked | 275 (57) | 11 475 (54) | 39 (77) | 21 784 (72) |
Past smoker | 171 (36) | 6671 (32) | 9 (18) | 5270 (18) |
Current smoker | 35 (7) | 2766 (13) | 3 (6) | 3137 (10) |
BMI (kg/m2) |
<23 | 38 (9) | 2130 (12) | 8 (19) | 6638 (31) |
23–25 | 113 (26) | 5396 (30) | 13 (31) | 5941 (28) |
26–27 | 87 (20) | 3685 (20) | 4 (10) | 2608 (12) |
⩾28 | 193 (45) | 7042 (39) | 17 (40) | 6060 (29) |
Age at diagnosis (years) |
<20 | 21 (4) | | 7 (15) | |
20–39 | 224 (48) | | 17 (37) | |
40–59 | 187 (40) | | 18 (39) | |
⩾60 | 37 (8) | | 4 (9) | |
Other respiratory diseases |
Childhood asthma | 12 (2) | 559 (3) | 3 (6) | 608 (2) |
Adult asthma* | 58 (12) | 420 (2) | 8 (16) | 825 (3) |
Chronic bronchitis | 92 (19) | 781 (4) | 14 (28) | 1273 (4) |
Emphysema | 30 (6) | 188 (1) | 2 (4) | 97 (0) |
Respiratory and allergic symptoms in the past year (farmers only) |
Wheeze | 192 (40) | 3789 (18) | –† | |
Shortness of breath | 218 (47) | 5159 (25) | –† | |
Runny nose | 353 (74) | 13 566 (67) | | |
Sinus problems | 194 (42) | 6990 (35) | | |
Watery eyes | 209 (45) | 7117 (36) | | |
Cold | 414 (88) | 16 418 (80) | | |
Flu | 179 (38) | 6082 (30) | | |
Farming history |
Lived on farm as a child | 459 (96) | 19 095 (92) | 39 (78) | 18 137 (60) |
Years lived on farm |
<5 | 1 (0) | 297 (1) | 0 (0) | 1941 (7) |
5–10 | 4 (1) | 416 (2) | 1 (2) | 2331 (8) |
11–20 | 13 (3) | 1457 (7) | 0 (0) | 4969 (17) |
21–30 | 42 (9) | 2827 (14) | 11 (22) | 5337 (18) |
⩾31 | 414 (87) | 15 582 (76) | 39 (76) | 15 263 (51) |
Farm size (acres) |
0 | 5 (1) | 1329 (7) | 1 (2) | 1576 (6) |
<5 acres | 9 (2) | 770 (4) | 0 (0) | 877 (3) |
5–49 | 17 (4) | 1984 (10) | 4 (8) | 2281 (8) |
50–199 | 69 (15) | 3613 (18) | 11 (22) | 4791 (17) |
200–499 | 158 (34) | 5646 (28) | 15 (31) | 8303 (29) |
500–999 | 132 (28) | 4284 (21) | 12 (24) | 6553 (23) |
⩾1000 | 79 (17) | 2577 (13) | 6 (12) | 3988 (14) |
Days worked in field‡ |
None | –† | | 11 (22) | 14 529 (49) |
<10 | | | 8 (16) | 5858 (20) |
10–30 | | | 11 (22) | 5254 (18) |
31–100 | | | 12 (24) | 3367 (11) |
⩾100 | | | 7 (14) | 846 (3) |
Respiratory protection when applying pesticides |
Cartridge respirator | 36 (7) | 1974 (9) | –† | |
Dust mask | 122 (25) | 4300 (21) | –† | |