Impact of generosity level of outpatient prescription drug coverage on prescription drug events and expenditure among older persons.
OBJECTIVE
This study examined the impact of drug coverage generosity on older persons' prescription events (fills) and expenditures.


METHODS
A cross-sectional study was conducted of 6237 older persons from the 1995 Medicare Current Beneficiary Survey. Dependent variables were per capita prescription events and expenditures. Independent variables were insurance type and drug coverage generosity. Control variables included sociodemographic and health status factors.


RESULTS
Regardless of insurance type, per capita prescription events increased as drug coverage generosity improved and then decreased at the most generous level. Per capita prescription expenditures increased as generosity improved; with generous prescription coverage, prescription expenditures were approximately 3 times those with Medicare only.


CONCLUSIONS
Even when factors that affect drug use and insurance selection are controlled, prescription coverage generosity influences prescription use.
Artz
Margaret B
MB
Department of Experimental and Clinical Pharmacology, College of Pharmacy, University of Minnesota, Minneapolis, MN 55455, USA. artzx001@tc.umn.edu
Hadsall
Ronald S
RS
Schondelmeyer
Stephen W
SW
D000368:Aged; D000369:Aged, 80 and over; D017047:Cost Sharing; D011307:Drug Prescriptions / Q000191:economics*; D004358:Drug Therapy / Q000191:economics / Q000706:statistics & numerical data*; D005260:Female; D019538:Health Care Surveys; D006279:Health Maintenance Organizations / Q000191:economics*; D006801:Humans; D019458:Insurance Coverage / Q000145:classification; D007356:Insurance, Pharmaceutical Services / Q000145:classification / Q000191:economics*; D008297:Male; D006278:Medicare / Q000191:economics*; D010349:Patient Compliance / Q000706:statistics & numerical data*; D020377:Self Efficacy; D014481:United States