Table 1.

Sample characteristics for Add Health participants.

	EA (N=5,641)		HA (N=1,444)		AA (N=1,740)
	Mean (SD) or %	Range	Mean (SD) or %	Range	Mean (SD) or %	Range
Gender (female)	52%	NA	50%	NA	55%	NA
Current smoking	40%	NA	25%	NA	29%	NA
Age (years)	28.4 (1.8)	24.0 – 34.0	28.8 (1.8)	24.0 – 34.0	28.4 (1.8)	24.0 – 33.0
BMI	28.4 (7.0)	14.4 – 79.2	29.6 (7.0)	14.3 – 67.9	30.1 (8.0)	16.5 – 71.7
HbA1c (%)	5.4 (0.3)	3.8 – 6.4	5.5 (0.3)	4.1 – 6.4	5.7 (0.4)	4.2 – 6.4
Pre-diabetic*	14%	NA	23%	NA	40%	NA

^*Defined as HbA1c between 5.7%–6.4%