TABLE 3.
Description of the Three Primary Exposure Variables, NCCLS Contact Current Study
| Bavga (μT) |
Vbathb (mV) |
VW-Ec (mV) |
||||
|---|---|---|---|---|---|---|
| Cases (n = 245) | Controls (n = 269) | Cases (n = 245) | Controls (n = 268) | Cases (n = 219) | Controls (n = 257) | |
| Mean (SD) | 0.047 (0.070) | 0.046 (0.078) | 4.12 (15.92) | 5.74 (28.45) | 123.3 (157.6) | 126.0 (133.1) |
| Median | 0.023 | 0.020 | 0.30 | 0.25 | 76.6 | 89.7 |
| 90th percentile | 0.113 | 0.094 | 8.30 | 10.50 | 320.0 | 291.2 |
a
Bavg is the indoor magnetic-field measurement.
b
Vbath is the indoor contact voltage measurement (voltage measured between the faucet and the drain in the bathtub).
c
VW-E is the outdoor contact voltage measurement (voltage measured between the water main and pole in the ground).