Table 4 Characteristics of dogs with discordant (blocked antigen: positive for antigen only after dissociation of immune complexes) and concordant (positive or negative for antigen both before and after dissociation of immune complexes) antigen test results
|  | Discordant dogs (n = 22) | Concordant dogs (n = 361) | All dogs (n = 383) | ||
|---|---|---|---|---|---|
Modified Knott’s test positive (n = 8) | Modified Knott’s test negative (n = 14) | Conventional antigen testing positive (n = 48) | Conventional antigen testing negative (n = 313) | ||
Age (years), median (IQR) | 2.3 (1.3–4.0) | 2.3 (2.0 –4.0) | 5.0 (2.0–5.0) | 1.5 (0.8–2.6) | 2.0 (1.0–3.0) |
Sex | |||||
 Male | 2 (9.1%) | 4 (18.2%) | 29 (8.0%) | 140 (38.8%) | 175 (45.7%) |
 Female | 6 (27.3%) | 10 (45.5%) | 19 (5.3%) | 158 (43.8%) | 193 (50.4%) |
 Missing | 0 (0%) | 0 (0%) | 0 (0%) | 15 (4.2%) | 15 (3.9%) |
Location | |||||
 Townsville | 8 (36.4%) | 13 (59.1%) | 46 (12.7%) | 142 (39.3%) | 209 (54.6%) |
 Brisbane | 0 (0%) | 1 (4.5%) | 2 (0.6%) | 171 (47.4%) | 174 (45.4%) |