Table 2 Comparison of two approaches to predict daughter birth serum-OC based on maternal serum-OCa
Daughter No. | Measurement of maternal serum-OC (μg/L) | The time of daughter’s birth before (−)/after (+) maternal measurement (in years) | Predictions for daughters’ serum-OC at birth (μg/L) | |
|---|---|---|---|---|
Karmaus et al. approach (2004) | Mixed Models approach | |||
PCB | ||||
 1 | 11.0 | 1.49 | 6.66 | 10.92 |
 2 | 6.4 | −1.84 | 3.31 | 6.48 |
 3 | 6.6 | −1.52 | 3.48 | 5.84 |
 4 | 16.3 | −0.08 | 9.19 | 15.42 |
 5 | 10.2 | −0.37 | 5.70 | 8.88 |
 6 | 1.5 | −1.07 | 0.67 | 1.23 |
 7 | 4.8 | −0.06 | 2.70 | 4.90 |
 8 | 4.5 | 1.63 | 2.63 | 4.66 |
 9 | 5.0 | 1.03 | 2.97 | 5.63 |
 10 | 3.0 | 1.70 | 1.96 | 3.34 |
|  |  |  | rspearman =  0.988 (p < 0.001) | |
DDE | ||||
 2 | 12.8 | −1.84 | 6.93 | 13.58 |
 4 | 19.8 | −0.08 | 11.17 | 19.87 |
 5 | 9.1 | −0.37 | 5.08 | 9.14 |
 6 | 4.3 | −1.07 | 2.25 | 4.32 |
 7 | 4.5 | −0.06 | 2.53 | 4.54 |
 8 | 6.2 | 1.63 | 2.07 | 6.24 |
 10 | 5.7 | 1.70 | 0.00 | 4.59 |
 11 | 6.9 | −1.52 | 3.65 | 6.93 |
|  |  |  | rspearman =  0.810 (p = 0.0149) | |