BMC Health Services Research

Table 2 FOLLOW-UP medication use and cost in 2009^a

From: Giving formulary and drug cost information to providers and impact on medication cost and use: a longitudinal non-randomized study

	All drugs			Generic drugs			Brand-name drugs
Follow-up Year (2009)	Control	Study	p-value	Control	Study	p-value	Control	Study	p-value
Medication use
Number of prescriptions	38.6	38.0	0.97	22.0	23.0	0.08	16.6	15.0	0.04*
Total days supply	1374	1362	0.67	768	815	0.02*	606	547	0.049*
Total drug cost, $
Per year	4131	3800	0.11	861	890	0.29	3270	2910	0.049*
Per 30-day supply	90	83	0.003*	36	34	0.02*	159	152	0.08
Out-of-pocket cost, $
Per year	545	504	0.18	127	134	0.03*	418	370	0.07
Per 30-day supply	12	11	0.01*	6	5	0.02*	21	20	0.03*

*Statistically significant at p < 0.05
^aMultivariate analyses SAS Proc Mixed 9.4 comparing Control (n = 3061) vs. Study patients (n = 2822), controlling for clustering by provider and controlling for provider specialty. Standard deviations for Follow-up medication use and cost in 2009 are available in Additional file 1: Appendix 2.

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