Table 1.
Selected characteristics of hog farmers and controlsa
| Characteristic | Hog farmers N (%) |
Controls N (%) |
|---|---|---|
| No. of participants | 61 | 61 |
| Age at phlebotomy, median (range) | 56 (50–72) | 56 (50–70) |
| Race | ||
| Non-Hispanic white | 60 (98) | 59 (97) |
| Other/missing | 1 (2) | 2 (3) |
| Education | ||
| High school or less | 21 (34) | 30 (49) |
| Some college or vocational school | 20 (33) | 18 (30) |
| College graduate | 19 (31) | 12 (20) |
| Other/missing | 1 (2) | 1 (2) |
| Body mass index | ||
| <25 kg/m2 | 8 (13) | 6 (10) |
| 25–29.9 kg/m2 | 33 (54) | 31 (51) |
| ≥30–34.9 kg/m2 | 20 (33) | 24 (39) |
| Season of phlebotomy | ||
| January – March | 21 (34) | 26 (43) |
| April – June | 15 (25) | 11 (18) |
| July – September | 19 (31) | 15 (25) |
| October – December | 6 (10) | 9 (15) |
| Recent (past 7 days) respiratory infectionb | ||
| No | 53 (87) | 42 (69) |
| Yes | 8 (13) | 19 (31) |
| Recent (past 7 days) NSAID use | ||
| No | 24 (39) | 23 (38) |
| Yes | 37 (61) | 38 (62) |
| Raised cattle (past 12 months) | ||
| No | 40 (66) | 40 (66) |
| Yes | 21 (34) | 21 (34) |
Notes: NSAID, non-steroidal anti-inflammatory drugs
a
Reported as frequencies (%) unless otherwise noted.
b
P < 0.05, chi-square test