“…Some analyses of drug court programs have found that older age predicts successful completion (Hickert, Boyle, & Tollefson, 2009;Mateyoke-Scrivner, Webster, Staton, & Leukefeld, 2004;Stageberg, Wilson, & Moore, 2001;Wolf, Sowards, & Wolf, 2003), although other studies have not demonstrated a positive relationship between age and outcome (Butzin, Saum, & Scarpitti, 2002;Gray & Saum, 2005). The relationship between age and outcome among amphetamine-using drug court participants is unknown.…”