| Intercept | Linear | Quadratic | Cubic | Quartic | χ2 | df | p | |
|---|---|---|---|---|---|---|---|---|
| PD | 0.0384 (0.03) | −0.0217 (0.1) | 0.0101 (0.07) | −0.0288 (0.05) | 0.0474 (0.04) | 0.00 | 25 | 1.0000 |
| PD*AR | −0.0227 (0.02) | 0.2156 (0.11) | −0.1887 (0.09) | −0.0477 (0.04) | −0.1214 (0.04) | 5.18 | 5 | 0.3945 |
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