. 2020 Mar 24;3(3):e201417. doi: 10.1001/jamanetworkopen.2020.1417

Table 3. Maternal Exposure to MF Nonionizing Radiation During Pregnancy and Risk of ADHD in Offspring With or Without Diagnosis Persisting Into Adolescence.

MF at 90th percentile	ADHD, No. (%)		aHR (95% CI)^a
MF at 90th percentile	Yes	No	aHR (95% CI)^a
Persistent ADHD^b
Low (n = 566)^c	6 (1.1)	560 (98.9)	1 [Reference]
High (n = 876)^d	43 (4.9)	833 (95.1)	3.38 (1.43-8.02)
No ADHD diagnosis in adolescence
Low (n = 566)^c	6 (1.1)	560 (98.9)	1 [Reference]
High (n = 839)^d	6 (0.7)	833 (99.3)	0.60 (0.19-1.91)

Abbreviations: ADHD, attention-deficit/hyperactivity disorder; aHR, adjusted hazard ratio; MF, magnetic field.

^{^a}

Adjusted for maternal age, race/ethnicity, educational level, prenatal smoking and alcohol use, prepregnancy body mass index, and sex of offspring.

^{^b}

Defined as those who continued to have ADHD diagnoses at 12 years of age or older.

^{^c}

The level of MF nonionizing radiation exposure is lower than 1.3 mG.

^{^d}

The level of MF nonionizing radiation exposure is 1.3 mG or higher.