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. Author manuscript; available in PMC: 2018 Sep 6.
Published in final edited form as: J Ethn Subst Abuse. 2017 Aug 28;17(2):150–166. doi: 10.1080/15332640.2017.1336959

Table 3.

Milestone and Progression Means by Race

Substance Race Initial
Use*
Regular
Use*
Problem
Use*
Treatment
Entry*
Alcohol Caucasian 11.7 (4.1) 6.8 (6.0) 18.5 (5.6) 3.1 (6.0) 21.5 (7.8) 10.2 (8.5) 32.3 (9.8)
African American 12.7 (4.6) 5.4 (4.7) 18.2 (4.9) 2.0 (5.6) 20.2 (6.8) 15.6 (11.6) 35.6 (10.8)
Marijuana Caucasian 13.6 (2.9) 2.0 (2.9) 15.6 (3.9) .83 (3.4) 16.6 (4.2) 10.6 (7.9) 27.4 (7.9)
African American 15.0 (3.4) 2.4 (3.5) 17.3 (4.4) 1.0 (4.3) 18.7 (5.6) 14.2 (10.5) 32.6 (10.4)
Cocaine Caucasian 20.4 (6.6) 2.7 (5.3) 23.0 (8.0) 1.9 (6.1) 25.1 (8.0) 5.8 (5.8) 30.1 (8.4)
African American 22.9 (7.2) 2.5 (5.3) 25.3 (8.6) .97 (6.1) 26.3 (8.2) 10.4 (10.0) 35.5 (10.6)
*

Milestones (Initial Use, Regular Use, Problem Use, Treatment) reported as participant age [M(SD)]

Progression Measures reported as years elapsed between milestones [M(SD)]