Table 1.

Descriptive Characteristics (N = 5,988).

	Early first use (ages 12–14, n = 1,961) M or proportion (95% confidence interval)	Late-early first use (ages 15–17, n = 4,027) M or proportion (95% confidence interval)
Race
White	70.3 [67.4, 73.3]	73.1 [71.5, 74.6]
Black	10.7 [9, 12.3]	10.9 [9.5, 12.2]
Hispanic	13.7 [11.4, 16.1]	11.8 [10.8, 12.9]
Other	5.3 [4.2, 6.3]	4.2 [3.6, 4.9]
Gender
Male	41.7 [39, 44]	47.5 [45.2, 50]
Female	58.3 [55.6, 61]	52.5 [50.2, 54.8]
High school diploma/GED
Yes	85.5 [83.5, 87.5]	91.1 [90.1, 92]
No	14.5 [12.5, 16.5]	8.9 [8, 9.9]
Employed
Yes	91.5 [90, 93.1]	94.1 [93.2, 95]
No	8.5 [6.9, 10.1]	5.9 [5, 6.8]