Table 5.
Ratio of six-month to last-month measures of antibiotic usage data collected on a sample of 20 farms in Cajamarca, Peru
| Ratioa | SD | P-value for Wilcoxon rank sum test comparing bin and self-reported measures | |
|---|---|---|---|
| Bin bottles | 6.98 | 5.27 | 0.12 |
| Self-reported bottles | 4.24 | 4.12 | |
| Bin volume (mLs) | 19.3 | 50.1 | 0.09 |
| Self-reported volume (mLs) | 5.62 | 7.51 | |
| Bin intra-mammary infusions | 5.23 | 1.21 | 0.17 |
| Self-reported intra-mammary infusions | 3.83 | 1.90 |
a
If antibiotic use is consistent over the six-month period, the expected ratio is 6