Table 1.

Descriptive Statistics for Study Variables, n (%) or Mean (standard deviation)

	Whites (n= 100)	Racial/Ethnic Minorities (n= 89)	Full Available Sample (MBRP and RP conditions only; n = 191)
Gender
Male	71 (72.4%)	59 (69.4%)	132 (71.0%)
Female	27 (27.6%)	26 (30.6%)	54 (29.0%)
Self-reported Race/Ethnicity
Non-Hispanic white	100 (100%)	–	100 (52.9%)
Black/African-American	–	39 (43.8%)	39 (20.6%)
Native American	–	14 (15.7%)	14 (7.4%)
Asian	–	1 (1.1%)	1 (0.5%)
Native Hawaiian/Pacific Islander	–	1 (1.1%)	1 (0.5%)
Mixed (selected multiple categories)	–	18 (20.2%)	18 (9.5%)
Not specified	–	3 (3.4%)	3 (1.6%)
Hispanic or Latina/Latino	–	17 (19.1%)	19 (10.1%)
Age	37.30 (10.93)	41.16 (10.60)*	39.04 (10.93)
Educational Level
High School Degree/GED or Less	47 (48.0%)	49 (56.3%)	99 (52.4%)
Completed at Least some College	51 (52.0%)	38 (43.7%)	90 (47.6%)
Unemployed	66 (67.3%)	52 (59.1%)	120 (63.2%)
Income
$4999 or below	65 (71.4%)	46 (70.8%)	111 (70.7%)
$5000 or above	26 (28.6%)	19 (29.2%)	46 (29.3%)
Abstinence from Drug Use at Baseline	86 (92.5%)	83 (96.5%)	174 (94.6%)
Abstinence from Drinking at Baseline	88 (94.6%)	81 (94.2%)	174 (94.6%)
Substance Dependence Severity	9.97 (4.05)	9.75 (3.93)	9.87 (3.99)
Prior Treatment Episodes	1.53 (1.70)	1.79 (1.49)	1.64 (1.60)
Treatment Hours Completed During the Study	12.53 (7.46)	11.92 (6.09)	12.19 (6.81)
Alcohol Use Only	17 (17.3%)	8 (9.1%)	25 (13.2%)
Polysubstance Use	77 (78.6%)	76 (86.4)	156 (82.1%)
12-Month Drug Use Days	2.61 (14.60)	6.57 (19.58)*	4.46 (17.04)
12-Month Heavy Drinking Days	1.27 (5.74)	4.10 (13.24)*	2.59 (10.07)

Note. MBRP = Mindfulness-Based Relapse Prevention. RP = Relapse Prevention.

^*significant difference (p <.05) between whites and minorities based on t-tests or chi-square tests