“…We found no published analyses of the NESARC data that focused on cocaine and opioid co-use. Also, most prior Wave 1 NESARC analyses have focused on lifetime substance use and/or diagnoses (e.g., Florez-Salamanca et al, 2013; Grella, Karno, Warda, Niv, & Moore, 2009; Lev-Ran, Imtiaz, Rehm, & Le Foll, 2013; Saha et al, 2012; Vaughn, Fu, Perron, Bohnert, & Howard, 2010; Wu Woody, Yang, & Blazer, 2010; 2011; Yoon, Westermeyer, Warwick, & Kuskowski, 2012), however current status arguably has greater clinical relevance. Two investigations by Wu et al (2010; 2011) are most relevant to the present study.…”