Table 2.
Descriptive statistics for each of the non-normally distributed continuous variables in this study
| Variable | Minimum | Q1 | Median | Q3 | Maximum |
|---|---|---|---|---|---|
| Herd size* | 6 | 135 | 296 | 547 | 4285 |
| Duration of index episode (days) | 102 | 251 | 315 | 463 | 1709 |
| Time between episodes (days) | 48 | 273 | 547 | 795 | 1617 |
| Number of skin test-positive animals during index episode | 0 | 1 | 2 | 7·86 | 145 |
| Proportion of herd skin-test positive | 0 | 0·002 | 0·009 | 0·024 | 0·500 |
| Number of animals slaughtered during index | 0 | 0 | 1 | 3 | 52 |
| Proportion of herd slaughtered | 0 | 0 | 0·004 | 0·013 | 0·679 |
| Number of positive bTB cases during index episode | 1 | 1 | 1 | 2 | 21 |
| Proportion of herd detected with bTB esions | 0·001 | 0·002 | 0·004 | 0·012 | 0·333 |
bTB, Bovine tuberculosis.
*
Number of animals tested at index test following breakdown.