Table 1 Risk factors in dogs tested for Dirofilaria immitis antigen from Queensland, Australia
Risk factors | Positive for D. immitis antigena | Negative for D. immitis antigen | Total | P value | Odds ratio | 95% Confidence interval |
|---|---|---|---|---|---|---|
Locationb | 0.010 | |||||
Southern QLD | 7 | 123 | 130 | 1 | − | |
Northern QLD | 7 | 28 | 35 | 4.39 | 1.26–13.51 | |
Sex/status | 0.474 | |||||
Male neutered | 3 | 64 | 67 | 1 | − | |
Female entire | 4 | 25 | 29 | 3.41 | 0.71–16.36 | |
Female neutered | 5 | 43 | 48 | 2.48 | 0.56–10.93 | |
Male entire | 2 | 19 | 21 | 2.25 | 0.35–14.44 | |
Age | 0.868 | |||||
≤ 2 years | 7 | 72 | 79 | 1 | − | |
> 2 years | 7 | 79 | 86 | 0.91 | 0.31–2.73 | |
Source | 0.299 | |||||
Stray | 10 | 125 | 135 | 1 | − | |
Surrender | 4 | 26 | 30 | 1.92 | 0.56–6.61 | |
Total | 14 | 151 | 165 |