Prenatal exposure to ambient air pollution is associated with neurodevelopmental outcomes at 2 years of age

Table 1 Characteristics of Mother-Infant Pairs from the Southern California Mother’s Milk Study at the 1-Month Baseline Visit

	Mean ± SD
Maternal Characteristics
Maternal Age (years)	29.02 ± 6.21
Pre-pregnancy BMI (kg/m²)	28.55 ± 5.82
Maternal BMI (kg/m²)	30.16 ± 5.08
Socioeconomic Status	26.81 ± 12.06
Infant Characteristics
Infant Sex F/M (%F)	91/70 (56.5%)
Gestational Age Early/On Time/Late (% On Time)	33/86/42 (53.4%)
Infant Birthweight (kg)	3.40 ± 0.41
Infant Age (days)	32.65 ± 3.99
Breastfeeding / Day	6.73 ± 2.21

Descriptive characteristics of 161 Latino mother-infant pairs from the Southern California Mother’s Milk Study. Data are reported as mean ± standard deviation (SD) unless indicated otherwise. Socioeconomic status (SES) is estimated based off the Hollingshead Four-Factor Index where missing values are replaced by median. Gestational age was based on time of delivery, which included on-time, early (≥ 2 weeks before due date), and late (≥ 2 weeks after due date)

ISSN: 1476-069X