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. Author manuscript; available in PMC: 2018 Jul 3.
Published in final edited form as: Subst Use Misuse. 2017 Mar 21;52(8):1059–1068. doi: 10.1080/10826084.2016.1271985

Table 1.

Demographics of orignial samples

Sample 1
(n = 561)
Sample 2
(n = 563)
Gender n (%) n (%)

  Male 158 (28.2) 203 (36.1)
  Female 396 (70.6) 359 (63.8)
  Missing 7 (1.2) 1 (0.2)

Age n (%) n (%)

  M (SD) 22.22 (6.79) 20.11 (3.67)
  18 72 (12.8) 198 (35.2)
  19 79 (14.1) 131 (23.3)
  20 107 (19.1) 83 (14.7)
  21+ 292 (52.1) 148 (26.3)
  Missing 11 (2.0) 3 (0.5)

Race/Ethnicity n (%) n (%)

  American Indian/Alaska Native 20 (3.6) 33 (5.9)
  Asian 16 (2.9) 30 (5.3)
  Black/African American 190 (33.9) 28 (5.0)
  Native Hawaiian/Pacific Islander 7 (1.2) 4 (0.7)
  White, non-Hispanic | White 322 (57.4) 186 (33.0)
  Other 16 (2.9) 6 (1.1)
  Hispanic/Latino 63 (11.2) 313 (55.6)
  Missing 2 (0.4) 5 (0.9)

Education n (%) n (%)

  Freshman 116 (20.7) 248 (44.0)
  Sophomore 114 (20.3) 129 (22.9)
  Junior 168 (29.9) 90 (16.0)
  Senior 157 (28.0) 92 (16.3)
  Graduate Student 0 (0.0) 3 (0.5)
  Missing 6 (1.1) 1 (0.2)

Note. Race and ethnicity were assessed with separate checkbox items (i.e., could select multiple options) in both samples. It is important to note that the samples significantly differed on all demographic variables.