Table 1.
Distribution of AFL contamination in Iowa over 5 years for both risk thresholds (including 2020, which was used for internal validation).
| Summary statistics of AFL observations in Iowa | 5-ppb risk threshold | 20-ppb risk threshold | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Year | n | Mean | SD | High (#) | Low (#) | Prevalence of high threshold (%) | High (#) | Low (#) | Prevalence of high threshold (%) |
| 2010 | 49 | 0.09 | 0.60 | 0 | 49 | 0.00 | 0 | 49 | 0.00 |
| 2011 | 89 | 0.48 | 1.88 | 1 | 88 | 1.14 | 0 | 89 | 0.00 |
| 2012 | 388 | 5.04 | 16.97 | 67 | 321 | 20.87 | 22 | 366 | 6.01 |
| 2020 | 376 | 0.40 | 6.54 | 3 | 373 | 0.80 | 1 | 375 | 0.27 |
| 2021 | 104 | 0.01 | 0.09 | 0 | 104 | 0.00 | 0 | 104 | 0.00 |