Summary of the total and incremental costs of the interventions of IDPP and sensitivity analysis with hypothetical models
| Type of intervention | Cost of intervention | ||||||
|---|---|---|---|---|---|---|---|
| Control | LSM | Met | LSM + Met | ||||
| 1st year | 939 (21) | 3883 (86) | 3,568 (79) | 4,571 (102) | |||
| 2nd year | 900 (20) | 2594 (58) | 3,069 (68) | 3,254 (72) | |||
| 3rd year | 900 (20) | 3659 (81) | 3,244 (72) | 4,319 (96) | |||
| Total | 2,739 (61) | 10,136 (225) | 9,881 (220) | 12,144 (270) | |||
| No. needed to prevent one case of diabetes (NNT) | — | 6.4 | 6.9 | 6.5 | |||
| Incremental cost (IC) | — | 7,397 (164) | 7,142 (159) | 9,405 (209) | |||
| CER: IC × NNT | — | 47,341 (1,052) | 49,280 (1,095) | 61,133 (1,359) | |||
| Sensitivity analysis (CER) | |||||||
| No physician, effectiveness 10% less | 42,979 (955) | 49,176 (1,093) | 57,927 (1,287) | ||||
| Group sessions, effectiveness same | 37,670 (837) | 47,886 (1,064) | 51,311 (1,140) | ||||
| Group sessions, effectiveness 10% more | 33,903 (753) | 43,444 (965) | 46,259 (1,028) | ||||
Data are INR (U.S. $). CER, cost-effectiveness ratio; Met, metformin.