Table 4. Mean renal index scores and sample sizes (n) by antibody titer group for initially clinical (CLINICAL), initially subclinical (SUB), stranded (STRAND) and wild-caught (WILD) animals.
Titer group “0” contains all seronegative animals, titer group 0* contains only non-shedding (i.e. urine PCR negative) seronegative animals. P-values are for two-sided bootstrap Kolmogorov-Smirnov (KS) test comparisons between animal groups of renal index distributions for a given titer. P-values for WILD 11+ v. WILD are for one-sided bootstrap KS test comparisons within the WILD dataset, with the null hypothesis that the renal index distribution for the 11+ titer group will be greater. P-values for STRAND 0* v. STRAND are for two-sided bootstrap KS test comparisons within the STRAND dataset comparing renal index distributions of seronegative, non-shedding animals with the other titer groups.
| Antibody Titer Group | |||||||
|---|---|---|---|---|---|---|---|
| 11+ | 9–10 | 6–8 | 1–5 | 0 | 0* | ||
| Mean (n) | WILD | 0.65 (8) | -0.18 (8) | -0.33 (11) | -0.27 (22) | -0.32 (683) | -0.28 (562) |
| SUB | - | -0.49 (1) | -0.11 (1) | -0.42 (27) | - | - | |
| CLINICAL | 6.6 (18) | 1.47 (26) | 0.57 (22) | - | - | - | |
| STRAND | 6.44 (181) | 3.66 (76) | 0.82 (22) | 1.56 (45) | 0.3 (473) | 0.83 (78) | |
| KS test p-value | CLINICAL v. WILD | 0.001 | 0.005 | 0.002 | - | - | - |
| SUB v. WILD | - | - | - | 0.07 | - | - | |
| STRAND v. WILD | <0.001 | <0.001 | 0.04 | <0.001 | <0.001 | <0.001 | |
| STRAND v. CLINICAL | 0.56 | 0.002 | 0.04 | - | - | - | |
| STRAND v. SUB | - | - | - | <0.001 | - | - | |
| WILD 11+ v. WILD | 0.11 | 0.04 | 0.02 | 0.04 | - | ||
| STRAND 0* v. STRAND | <0.001 | <0.001 | 0.66 | 0.39 | - | - | |
| WILD 0* v. WILD | 0.07 | 0.38 | 0.66 | 0.06 | - | - | |