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. Author manuscript; available in PMC: 2012 Nov 1.
Published in final edited form as: J Child Adolesc Subst Abuse. 2011 Nov 1;20(5):407–420. doi: 10.1080/1067828x.2011.614873

Table 7.

Differences of internal consistency for marijuana use by ethnicity and sex

Internally Consistent Not Internally Consistent Chi-Square Value
1998
Hispanic 130 (77.8) 37 (22.2) 8.39*
African American 152 (76.8) 46 (23.2)
    Non-Hispanic, Non-African American 238 (86.2) 38 (13.8)
1994
Male 113 (75.8) 36 (24.2) 4.00*
Female 111 (85.4) 19 (14.6)
1998
Male 246 (76.6) 75 (23.4) 8.46**
Female 274 (85.6) 46 (14.4)
*

p < .05

**

p < .01