Table 6.
Outcomes of the relative risk (RR) analysis based on the L∗ and b∗ (specular component included [SCI] or excluded [SCE]) cut-offs from the receiver operating characteristic (ROC) analysis.
| Cut-off | Samples n | Non-compliant bee pollen samples (%) | Chi-square test | P | RR (95% CI) |
|---|---|---|---|---|---|
| L∗_SCI | |||||
| ≤67 | 21 | 71.4 | 7.32 | 0.01 | 2.71 (1.31–5.73) |
| >67 | 23 | 26.1 | |||
| b∗_SCI | |||||
| ≤38 | 25 | 64.0 | 4.73 | 0.03 | 2.43 (1.08–5.45) |
| >38 | 19 | 26.3 | |||
| L∗_SCE | |||||
| ≤62 | 24 | 66.7 | 6.01 | 0.01 | 2.67 (1.19–6.00) |
| >62 | 20 | 25.0 | |||
| b∗_SCE | |||||
| ≤49 | 29 | 58.6 | 2.87 | 0.09 | 2.20 (0.90–5.37) |
| >49 | 15 | 26.7 | |||
L∗, lightness; b∗, yellowness; RR, relative risk; Non-compliant, PAs/PANOs ≥ 84 μg kg−1; CI, confidence interval.