Table 2—

Summary of the total and incremental costs of the interventions of IDPP and sensitivity analysis with hypothetical models

Type of interventionCost of intervention
ControlLSMMetLSM + Met
1st year939 (21)3883 (86)3,568 (79)4,571 (102)
2nd year900 (20)2594 (58)3,069 (68)3,254 (72)
3rd year900 (20)3659 (81)3,244 (72)4,319 (96)
Total2,739 (61)10,136 (225)9,881 (220)12,144 (270)
No. needed to prevent one case of diabetes (NNT)6.46.96.5
Incremental cost (IC)7,397 (164)7,142 (159)9,405 (209)
CER: IC × NNT47,341 (1,052)49,280 (1,095)61,133 (1,359)
Sensitivity analysis (CER)
    No physician, effectiveness 10% less42,979 (955)49,176 (1,093)57,927 (1,287)
    Group sessions, effectiveness same37,670 (837)47,886 (1,064)51,311 (1,140)
    Group sessions, effectiveness 10% more33,903 (753)43,444 (965)46,259 (1,028)
  • Data are INR (U.S. $). CER, cost-effectiveness ratio; Met, metformin.