Table 1.
Descriptive statistics of horse populations P1 and P2 including the number affected by the various hypersensitivities (RAO, IBH, URT) and environmental factors
| Variable | Horse Population | |
|---|---|---|
| P1 (n = 119) | P2 (n = 474) | |
| Sex (%) | ||
| Male | 69 (58) | 283 (60) |
| Female | 50 (42) | 191 (40) |
| Age (years) | ||
| Mean age | 16.4, 95% CI = 16.1–16.9 | 18.3, 95% CI = 18–18.7 |
| Age RAO+ | 17.3, 95% CI = 15.5–19.1 | 18, 95% CI = 17.5–18.5 |
| Age RAO− | 16.4, 95% CI = 15.9–16.8 | 18.6, 95% CI = 18.1–19.1 |
| RAO (%) | ||
| RAO+ | 11 (9) | 210 (44) |
| RAO− | 108 (91) | 264 (56) |
| IBH (%) | ||
| IBH+ | 6 (5) | 22 (5) |
| IBH− | 113 (95) | 452 (95) |
| URT (%) | ||
| URT+ | 16 (13) | 34 (7) |
| URT− | 103 (87) | 440 (93) |
| Stabled inside without windows (%) | ||
| Yes | 23 (19) | 235 (49.5) |
| No | 96 (81) | 239 (50.5) |
| Straw bedding (%) | ||
| Yes | 95 (80) | 412 (87) |
| No | 24 (20) | 62 (13) |
| Pasture access (%) | ||
| Yes | 111 (93) | 458 (97) |
| No | 8 (7) | 16 (3) |
| Deworming frequency (%) | ||
| 0–2×/year | 49 (39) | 178 (38) |
| >2×/year | 70 (61) | 296 (62) |
RAO, recurrent airway obstruction; IBH, insect bite hypersensitivity; URT, urticaria.