Test-retest reliability of the age at first drink measure used in this analysis was good, kappa=0.72 (Grant et al., 1995). Likewise, AUDADIS-IV alcohol diagnoses have demonstrated good reliability and validity in test-retest and other studies, including clinical reappraisals (Canino et al., 1999; Cottler et al., 1997; Grant et al., 1995, 2003; Hasin et al., 1997; Muthen et al., 1993; Nelson et al., 1999; Pull et al., 1997). Test-retest reliability for family history, childhood risk factors, alcohol consumption, use of tobacco, marijuana and cocaine, drug use disorders, and other Axis I disorders have been good to excellent, and personality disorders have demonstrated levels of reliability comparable to those reported in the clinical literature (Grant et al., 1995, 2003; Ruan et al., 2008).
