Variables suspected to be associated with the dog’s performance | OR* | 95% CI† |
Alpha variant (vs wild-type) | 14.0 | 4.5 to 43.4 |
Presence of COVID-19 symptoms | 2.2 | 0.3 to 19.3 |
Female (vs male) | 0.8 | 0.3 to 1.8 |
Concurrent chronic disease | 1.0 | 0.4 to 2.9 |
Days between start of symptoms and sampling (days) | 1.0 | 0.8 to 1.2 |
Days between PCR test and sampling (days) | 1.1 | 0.8 to 1.5 |
Age‡ | ||
30 | 1.0 | 0.7 to 1.3 |
40 (reference) | 1 | |
50 | 0.7 | 0.4 to 1.3 |
60 | 0.5 | 0.1 to 1.7 |
*OR, Odds Ratio.
†CI, confidence interval, significant only when not including the number one.
‡Age was included by using restricted cubic spline functions (see text for details).