Table 2.

Cost-Effectiveness of Each Intervention Compared With No Intervention in Middle-Aged Adults (50–64 Years) at 20 Years

Exemplar Study	Intervention Strategy	Total cost, 2003 $US	Total life years	Total QALY	Incremental cost ($)	Incremental life years	Incremental QALY	Cost/LY ($/LY)	Cost/QALY ($/QALY)
	No intervention	61,092	14.389	11.182	—	—	—	—	—
Reger et al10	Community-wide campaign	61,455	14.394	11.192	363	0.006	0.011	63,737	33,639
Lombard et al9	Social support	61,410	14.392	11.187	318	0.003	0.006	105,967	56,768
Linenger et al8	Enhanced access	62,243	14.401	11.206	1,151	0.013	0.024	89,217	47,954
Jeffery et al6	Individually adapted health behavior	61,916	14.396	11.195	825	0.007	0.014	112,973	59,331
Kriska et al7	Social support	61,607	14.392	11.188	515	0.003	0.007	151,500	79,246
Knowler et al5 (DPP)	Individually-adapted health behavior	62,141	14.395	11.194	1,050	0.007	0.013	156,657	82,646
Young et al11	Community-wide campaign	61,449	14.390	11.184	357	0.002	0.003	237,933	127,464

Note. QALY = quality-adjusted life year; LY = life year; DPP = diabetes prevention program. Values in Table 2 are rounded to no more than 3 decimal places. Future cumulative costs and benefits over a 20-year time horizon are reported in table as discounted, average, per person costs, and QALYs.