Table 1.

Demographic and descriptive statistics of study variables.

Variables		N	Mean (SD) or %
Birth weight percentile		115	64 (32.2)
Maternal age		117	30.15 (5.1)
Infant gender	Male	61	51%
	Female	57	48%
Maternal ethnicity	White, Non-Hispanic	83	69%
	Black	10	8%
	Hispanic	2	2%
	Other	19	16%
	Unknown	6	5%
Maternal education	<11th grade	8	7%
	HS/GED	21	18%
	Some college	22	18%
	College graduate	44	37%
	Any post college	21	18%
	Unknown	4	3%
Maternal tobacco use	Yes	6	5%
	No	107	89%
	Unknown	7	6%