“…NP SOP and characteristics of the health delivery system. Eight studies addressed the relationships between NP SOP policy and the characteristics of the health delivery system by addressing characteristics of the NP workforce (Barnes et al, 2017;DesRoches et al, 2013;Graves et al, 2016;Kuo et al, 2013;Poghosyan et al, 2015;Reagan & Salsberry, 2013;Sonenberg & Knepper, 2017;Sonenberg et al, 2015). NPs were more likely to work in PC, bill Medicare, or practice in states with the least restrictive NP SOP policies (Barnes et al, 2017;DesRoches et al, 2013;Graves et al, 2016;Kuo et al, 2013;Reagan & Salsberry, 2013).…”