Table 2.

Neurodevelopmental test results and averaged prenatal PM_2.5 exposure levels by sex

Variables	All children		Boys		Girls

	Median	IQR	Median	IQR	Median	IQR
Averaged prenatal PM_2.5 level (μg/m³)	11.3	10.5–12.0	11.2	10.4–11.9	11.6	10.6–12.0
Intelligence quotient; IQ (WISC-IV) ^a
Full-scale IQ score	94	87–102	93	86–102	95	88–103
Attention domains (CPT-II) ^b
Omission errors (OEs) percentile	91.8	62.0–99.0	92.6	58.8–99.0	91.6	67.0–99.0
Commission errors (CEs) percentile	70.9	45.9–86.5	77.8	52.1–88.1	68.5	44.2–85.4
Hit reaction time (HRT) percentile	79.3	44.7–94.0	74.9	38.5–94.1	81.5	51.3–93.9
Hit reaction time standard error (HRT-SE) percentile	91.9	71.3–98.2	91.6	67.1–97.5	92.9	75.2–98.8
Memory domains (WRAML-2) ^c
Verbal Memory Index (VEM) percentile	42	21–63	42	21–55	50	27–70
Visual Memory Index (VIM) percentile	27	12–50	34	8–58	24	12–50
Attention/Concentration Index (AC) percentile	50	27–73	50	24–73	50	27–73
General Memory Index (GM) percentile	37	16–55	34	14–55	37	17–55

Lower score in full-scale IQ indicates more adverse functioning

Higher percentile in CPT-II measures indicates worse performance

Lower percentile in WRAML-2 measures indicates poorer memory functioning