Table 3.

Comparison of the mean cost of medication wastage per prescription over a 11-year period (2004–2014) by treatment pattern (2015 £)

	Mean cost of repeat prescription wastage per prescription 2015 £ (95% CI)		Mean cost of dosage/formulation switch wastage per prescription		Mean cost of within-class treatment switch wastage per prescription 2015 £ (95% CI)		Mean cost of between-class treatment switch wastage per prescription 2015 £ (95% CI)
	<60 days	≥60 days	<60 days	≥60 days	<60 days	≥60 days	<60 days	≥60 days
Glucose control with oral drug therapy in T2DM	0.230 (0.226 to 0.233)	1.035 (0.772 to 1.298)	0.059 (0.058 to 0.061)	0.173 (0.143 to 0.204)	0.031 (0.029 to 0.032)	0.097 (0.080 to 0.114)	0.009 (0.008 to 0.010)	0.064 (0.051 to 0.078)
Hypertension in T2DM	0.050 (0.049 to 0.051)	0.271 (0.228 to 0.314)	0.038 (0.038 to 0.039)	0.128 (0.107 to 0.149)	0.004 (0.003 to 0.004)	0.013 (0.009 to 0.016)	0.003 (0.003 to 0.003)	0.026 (0.022 to 0.030)
Lipid management in T2DM	0.017 (0.017 to 0.017)	1.099 (0.832 to 1.367)	0.024 (0.023 to 0.024)	0.153 (0.081 to 0.225)	0.008 (0.007 to 0.008)	0.173 (0.075 to 0.271)	NA
Secondary prevention of myocardial infraction	0.043 (0.042 to 0.043)	0.439 (0.300 to 0.578)	0.014 (0.014 to 0.014)	0.040 (0.036 to 0.045)	0.009 (0.009 to 0.009)	0.029 (0.027 to 0.031)	0.00005 (0.00004 to 0.00006)	0.0006 (0.0003 to 0.0008)
Depression	0.044 (0.042 to 0.046)	0.214 (0.180 to 0.249)	0.146 (0.143 to 0.150)	0.141 (0.113 to 0.169)	0.006 (0.005 to 0.007)	0.013 (0.004 to 0.021)	0.012 (0.010 to 0.013)	0.061 (0.036 to 0.086)

NA, not applicable; T2DM, type 2 diabetes mellitus.