Table 3. In-utero Exposure to Magnetic Fields (MFs) and the Risk of Obesity/Overweight in Offspring among Children with 11 or more years of follow-up.
| MF exposure level1 | N of Children | aOR4 | 95% CI | p-value |
|---|---|---|---|---|
| Persistent obesity/overweight2 | ||||
| ≤1.5 mG | 68 | Reference | ||
| >1.5 mG | 168 | 4.97 | 1.01–24.5 | <0.05 |
| Dose-response relation | ||||
| 1.5–2.5 mG | 76 | 3.35 | 0.56–20.1 | 0.19 |
| >2.5 mG | 92 | 6.36 | 1.21–33.6 | 0.03 |
| Transitory obesity/overweight3 | ||||
| ≤1.5 mG | 87 | Reference | ||
| >1.5 mG | 186 | 0.84 | 0.43–1.63 | 0.61 |
| Dose-response relation | ||||
| 1.5–2.5 mG | 82 | 0.65 | 0.28–1.50 | 0.31 |
| >2.5 mG | 104 | 1.00 | 0.48–2.98 | 1.00 |
190th percentile of 24 hour MF exposure in milliGauss (mG).
2≥50% of measurements met definition of obesity/overweight (>97.5 percentile of weight-for-age based on CDC criteria 25) and the child remained obese/overweight at the end of follow up (vs. never overweight).
3<50% of measurements were above the cutoff of obesity/overweight or the child was no longer obese/overweight at the end of follow up (vs. never overweight)
4From logistic regression model, adjusted for child gender, maternal pre-pregnancy BMI, race, education level, smoking during pregnancy, and breastfeeding. Further adjustment for maternal age at delivery, parity, prior or gestational diabetes, income, preterm delivery, and childhood characteristics such as fruit and vegetable intake, TV watching, and exercise did not change results.