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Table 3 CHANGE in medication use and cost from BASELINE to FOLLOW-UP yeara

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

Change from 2007 to 2009

Control

Study

p-value

Control

Study

p-value

Control

Study

p-value

Medication use

 Number of prescriptions

3.2

2.7

0.24

2.1

1.9

0.43

1.1

0.8

0.32

 Total days supply

141

129

0.40

93

89

0.63

48

41

0.45

Total drug cost, $

 Per year

792

584

0.02*

2

−34

0.053

790

619

0.07

 Per 30-day supply

9.40

6.08

0.03*

−3.42

−5.11

0.065

30

25

0.20

Out-of-pocket cost, $

 Per year

41

31

0.36

15

14

0.44

26

17

0.44

 Per 30-day supply

−0.23

−0.19

0.996

0.30

0.13

0.19

0.32

−0.23

0.27

  1. *Statistically significant at p < 0.05
  2. 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 Change in medication use and cost from Baseline to Follow-up year are available in Additional file 1: Appendix 3.