. Author manuscript; available in PMC: 2017 Sep 1.

Published in final edited form as: Pharmacoepidemiol Drug Saf. 2016 Jun 6;25(9):993–997. doi: 10.1002/pds.4039

Table 1.

Opioid risk variable methodology shows the unaugmented and augmented distribution of opioid prescriptions with a risk variable value assigned or not assigned.

Oregon PDMP Opioid Prescriptions (October 2011–February 2014), n=10,777,752
	Unaugmented		Augmented
Opioid Risk Variable	Assigned	Not Assigned	Assigned	Not Assigned
MME Conversion Factor	8,631,283 (80.1%)	2,146,469 (19.9%)	10,775,644 (>99.9%)	2,108 (<0.1%)
Strength per Unit	8,631,283 (80.1%)	2,146,469 (19.9%)	10,760,669 (99.8%)	17,083 (0.2%)
Duration of Action	8,631,283 (80.1%)	2,146,469 (19.9%)	10,777,193 (>99.9%)	559 (<0.1%)