TABLE 3.
Individual farms distribution of foals within plasma type and odds ratios (OR) of pneumonia based on plasma type
| Farm | PNAG HIP | RE HIP | OR (95% CI) a | P value b | ||
|---|---|---|---|---|---|---|
| Pneumonia | Healthy | Pneumonia | Healthy | |||
| Kentucky | 1 (2%) | 46 (98%) | 6 (13%) | 42(87%) | 0.30 (0.04‐1.40) | .27 |
| Oklahoma | 6 (10%) | 52 (90%) | 6 (10%) | 54(90%) | 1.39 (0.45‐4.47) | .57 |
| New York | 17 (38%) | 28 (62%) | 12 (23%) | 40 (77%) | 2.67 (1.22‐5.99) | .02 |
| Texas 1 | 6 (15%) | 35 (85%) | 2 (5%) | 41 (95%) | 3.51 (0.75‐25.04) | .15 |
| Texas 2 | 0 (0%) | 24 (100%) | 6 (24%) | 19 (76%) | ND c | .02 c |
Note: Odds ratios (and 95% CIs) estimated using logistic regression for the outcome of pneumonia attributed to Rhodococcus equi for each of 5 farms where foals were transfused with either RE HIP or PNAG HIP.
Abbreviations: 95% CI, 95% confidence interval; PNAG HIP, β‐1→6‐poly‐N‐acetyl glucosamine hyperimmune plasma; RE HIP, Rhodococcus equi hyperimmune plasma.
a
OR = odds of pneumonia among foals transfused with PNAG HIP relative to RE HIP.
b
P values derived from logistic regression unless indicated by footnote “c.”
c
ND = not determined because incalculable due to complete separation; P value derived using Fisher's exact test.