Table 3.

Simulated economic outcomes in the Diabetes Prevention Program intervention groups over a lifetime^a

Outcome	Lifestyle intervention	Metformin intervention	Placebo Intervention
Lifetime intervention costs, $	9,718	8,801	2,907
Lifetime outcome costs, $	42,256	46,460	48,432
Total lifetime direct medical costs, $	51,974	55,261	51,339
Lifetime QALYs	10.89	10.45	10.32
∆ Cost vs. placebo, $	635	3,922	—
∆ QALY vs. placebo	0.57	0.13	—
∆ Cost / ∆ QALY, $	1,124	31,286	—

QALY quality-adjusted life-year

^aCosts and QALYs discounted at 3 % per year