“…We controlled for practice size and independent practice association (IPA) affiliation because they have been previously found to be associated with CMP use and HIT functionality (Casalino et al, 2003; Casalino et al, 2013; McClellan, Casalino, Shortell, & Rittenhouse, 2013; Nembhard, 2012; Rodriguez et al, 2014; Rundall et al, 2002; Shortell et al, 2009) and could potentially confound the estimated relationship of practice ownership and changes in CMP use and HIT functionality. We also controlled for practice revenue from uninsured patients, which was only modestly associated with practice revenue from Medicaid ( r = .24).…”