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Table 2 Summary results for the intervention effect on annual cost of prescription drugs

From: The effects of patient education programs on medication use among asthma and COPD patients: a propensity score matching with a difference-in-difference regression approach

 

2008

2009

2010

2011

Asthma/COPD drugs

192.6 (0.00)

192.2 (0.00)

204.9 (0.00)

156.6 (0.00)

 Asthma/COPD chronic management

164.5 (0.00)

178.5 (0.00)

195.5 (0.00)

157.1 (0.00)

 Asthma/COPD acute drugs

−6.45 (0.41)

−10.4 (0.18)

−6.09 (0.48)

−8.5 (0.40)

 Other asthma drugs (unclassified)

34.6 (0.06)

24.1 (0.18)

15.5 (0.35)

8.03 (0.60)

Other drugs

−2.6 (0.97)

51.4 (0.53)

168.2 (0.15)

109.1 (0.38)

All drugs

190.0 (0.04)

243.6 (0.02)

373.2 (0.01)

265.7 (0.06)

  1. Note: The numbers in parentheses show the p-values for the statistical significance of the estimated coefficient for the intervention effect. P-values for statistically significant results are shown in bold