Table 1.

Demographics Stratified by CYP2A6 Genotype

	CYP2A6 *1/*1 n=12	CYP2A6 *1/*17 n=2
Gestational age, weeks	25.7 (23.1–30.9)	25.2 (25.1–25.3)
Postnatal age, days	30 (1–66)	20 (11–29)
Postmenstrual age, weeks	31.6 (23.9–35.3)	28.1 (26.7–29.4)
Birth weight, kg	1.33 (0.57–1.96)	0.83 (0.69–0.96)
Race	6 (50) White/Caucasian 4 (33) Black/African American 2 (17) other	2 (100) Black/African American
Sex	8 (67) female	2 (100) female

Median (range) is provided for continuous data and n (%) for categorical data.