TABLE 1.
Sociodemographic, behavioral, and farm characteristics of Agricultural Health Study applicators (N=53,096) stratified by incident thyroid cancer
| Incident Thyroid Cancer |
|||
|---|---|---|---|
| No | Yes | ||
| N=53,011 | N=85 | ||
| N (%1) | N (%) | p-value2 | |
|
| |||
| Age at enrollment | |||
| ≤30 | 6,191 (11.7) | 12 (14.1) | 0.91 |
| 31–40 | 13,832 (26.1) | 22 (25.9) | |
| 41–50 | 13,888 (26.2) | 23 (27.1) | |
| 51–60 | 10,591 (20.0) | 14 (16.5) | |
| >60 | 8,509 (16.1) | 14 (16.5) | |
| State | |||
| Iowa | 34,724 (65.5) | 61 (71.8) | 0.22 |
| North Carolina | 18,287 (34.5) | 24 (28.2) | |
| Applicator type | |||
| Private | 48,543 (91.6) | 75 (88.2) | 0.27 |
| Commercial | 4,468 (8.4) | 10 (11.8) | |
| Smoking Status | |||
| Never | 27,299 (51.5) | 47 (55.3) | 0.03 |
| Former | 16,237 (30.6) | 33 (38.8) | |
| Current | 8,977 (16.9) | 5 (5.9) | |
| Missing | 498 (0.9) | 0 (0) | |
| Body Mass Index (kg/m2) | |||
| <25 | 9,898 (18.7) | 16 (18.8) | 0.67 |
| 25–29.9 | 19,569 (36.9) | 36 (42.4) | |
| ≥30 | 8,999 (17.0) | 11 (12.9) | |
| Missing | 14,545 (27.4) | 22 (25.9) | |
| Thyroid Disease3 | |||
| No | 49842 (94.0) | 70 (82.4) | <0.001 |
| Yes | 3169 (6.0) | 15 (17.4) | |
| Major Farm Crops/Animals | |||
| Cattle | 20,972 (39.6) | 29 (34.1) | 0.31 |
| Hogs | 16,470 (31.1) | 25 (29.4) | 0.74 |
| Alfalfa | 10,743 (20.3) | 17 (20.0) | 0.95 |
| Field Corn | 36,731 (69.3) | 58 (68.2) | 0.83 |
| Hay | 15,825 (29.9) | 24 (28.2) | 0.74 |
| Soybeans | 34,617 (65.3) | 51 (60.0) | 0.30 |
| Tobacco | 7,721 (14.6) | 11 (12.9) | 0.67 |
| Histologic subtype4 | |||
| Papillary | 66 (77.7) | ||
| Follicular | 11 (12.9) | ||
| Medullary | 5 (5.9) | ||
| Other/NOS | (3.5) | ||
1
Percentages may not sum to 100 due to rounding
2
Chi-square test for homogeneity
3
Ns based on a single imputation
4
ICD-O-3 morphology codes: Papillary (8050, 8260, 8340–8344, 8350, 8450), Follicular (8330–8332, 8335, 8290), Medullary (8510, 8345)