Table 2.

Descriptive information

	n (%)	Mean	SD	Range
Infant characteristics
Gestational age (weeks)	158 (97.5)	39.3	1.2	34.1–41.4
Birth weight (grams)	156 (96.3)	3361.5	491.3	1770–4560
NNNS completed (days after birth)	155 (95.7)	3.8	8.3	1–59
Sex (male)	77 (47.5)
Race
White/Caucasian	132 (72.5)
Asian	5 (2.7)
Black/African American	3 (1.6)
American or Alaskan Native	2 (1.1)
Hawaiian or Pacific Islander	1 (0.5)
Multiracial	37 (20.3)
Hispanic/Latinx	53 (29.1)
Delivery method
C-section	40 (24.7)
Vaginal	117 (72.2)
Maternal characteristics
Age at prenatal visit	162	29.0	5.2	18–40
Income
Less than $19,999	23 (14.2)
$20,000–$29,999	11 (6.8)
$30,000–$39,999	16 (9.9)
$40,000–$49,999	9 (6.0)
$50,000–$79,999	48 (29.6)
$80,000–$99,999	17 (10.5)
$100,000 and greater	24 (14.8)
Relationship status (partnered)	123 (75.9)
Race
White/Caucasian	128 (79.0)
Asian	15 (9.3)
Black/African American	2 (1.2)
American or Alaskan Native	5 (3.1)
Hawaiian or Pacific Islander	2 (1.2)
Multiracial	10 (6.2)
Hispanic/Latina	44 (27.2)

Note: NNNS, NICU Network Neurobehavioral Scale.