Table 3.
Predictors of DNA Yield (log_e transformed) in mothers
| |
HB (N = 446) |
Infant leukemia (N = 489) |
Combined (N = 935) |
||||||
|---|---|---|---|---|---|---|---|---|---|
| βa | % changeb | P value | βa | % changeb | P value | βa | % changeb | P value | |
| Age at DNA collection (years) |
|
|
|
|
|
|
|
|
|
| < 30 years |
Reference |
Reference |
|
Reference |
Reference |
|
Reference |
Reference |
|
| 30 – 35 years |
0.06 (−0.35-0.47) |
6.2 |
0.78 |
−0.25 (−0.67-0.16) |
−22 |
0.23 |
−0.11 (−0.41-0.18) |
−10 |
0.45 |
| 35 – 40 years |
−0.16 (−0.56-0.24) |
−15 |
0.43 |
0.04 (−0.39-0.46) |
4.1 |
0.86 |
−0.09 (−0.38-0.21) |
−8.6 |
0.57 |
| > 40 years |
−0.21 (−0.62-0.21) |
−19 |
0.33 |
−0.47 (−0.93- -0.01) |
−37 |
0.04 |
−0.37 (−0.68- -0.05) |
−31 |
0.02 |
| Study |
|
|
|
|
|
|
|
|
|
| HB |
NA |
NA |
NA |
NA |
NA |
NA |
Reference |
Reference |
|
| Infant leukemia |
NA |
NA |
NA |
NA |
NA |
NA |
0.05 (−0.15-0.26) |
5.1 |
0.63 |
| Case control status |
|
|
|
|
|
|
|
|
|
| Control |
Reference |
Reference |
|
Reference |
Reference |
|
Reference |
Reference |
|
| Case |
−0.13 (−0.41-0.16) |
−12 |
0.38 |
0.41 (0.09-0.72) |
51 |
0.01 |
0.14 (−0.08-0.36) |
15 |
0.21 |
| Maternal race |
|
|
|
|
|
|
|
|
|
| White |
Reference |
Reference |
|
Reference |
Reference |
|
Reference |
Reference |
|
| Other |
0.10 (−0.23-0.44) |
11 |
0.54 |
0.13 (−0.27-0.53) |
14 |
0.53 |
0.13 (−0.14-0.39) |
14 |
0.34 |
| Season of DNA collection |
|
|
|
|
|
|
|
|
|
| Spring |
Reference |
Reference |
|
Reference |
Reference |
|
Reference |
Reference |
|
| Summer |
0 (−0.37-0.37) |
0 |
1.00 |
0.30 (−0.12-0.73) |
35 |
0.16 |
0.18 (−0.10-0.46) |
20 |
0.20 |
| Fall |
−0.19 (−0.57-0.20) |
−18 |
0.35 |
0.82 (0.43-1.21) |
127 |
<0.0001 |
0.39 (0.11-0.66) |
48 |
0.007 |
| Winter | 0.25 (−0.15-0.65) | 28 | 0.22 | 0.46 (0.04-0.87) | 58 | 0.03 | 0.35 (0.06-0.64) | 42 | 0.02 |
a Models were adjusted for all other variables in table.
b Percent change in DNA yield relative to referent.