Parameter varied | Incremental Costs (IVIG-corticosteroids) | Incremental QALYs (IVIG-corticosteroids | $/QALY IVIG vs. corticosteroids |
---|---|---|---|
Patient Weight | Â | Â | Â |
35 kg | $58,102 | 0.177 | $327,665 |
45 kg | $74,043 | 0.177 | $417,569 |
55 kg | $89,985 | 0.177 | $507,474 |
65 kg | $105,927 | 0.177 | $597,378 |
75 kg | $121,869 | 0.177 | $687,282 |
85 kg | $137,810 | 0.177 | $777,186 |
95 kg | $153,752 | 0.177 | $867,090 |
Starting Age | Â | Â | Â |
35 years old | $122,293 | 0.178 | $686,130 |
45 years old | $122,077 | 0.178 | $686,759 |
55 years old | $121,504 | 0.177 | $687,371 |
65 years old | $119,999 | 0.176 | $683,643 |
75 years old | $116,182 | 0.170 | $683,219 |
Discount rate | Â | Â | Â |
0% | $126,340 | 0.185 | $682,390 |
3% | $123,542 | 0.180 | $685,346 |
Model time horizon | Â | Â | Â |
   1 year | $59,546 | 0.078 | $764,917 |
   3 years | $102,457 | 0.146 | $702,569 |
   5 years | $121,869 | 0.177 | $687,282 |
   10 years | $139,986 | 0.209 | $670,396 |
   20 years | $143,690 | 0.218 | $658,267 |
Incremental IVIG utility gain = 0.25 | $121,869 | 0.364 | $335,038 |
Assume corticosteroid patients switch to IVIG after adverse event | $113,444 | 0.166 | $682,309 |
Relapse rate for IVIG not extrapolated beyond 25 weeks | $173,189 | 0.257 | $672,616 |
Maintenance IVIG dose and frequency | Â | Â | Â |
   1.0 mg/kg every 3 weeks | $121,869 | 0.177 | $687,282 |
   1.0 mg/kg every 6 weeks | $65,304 | 0.177 | $368,284 |
   1.0 mg/kg every 8 weeks | $51,163 | 0.177 | $288,535 |
   0.4 mg/kg every 3 weeks | $55,661 | 0.177 | $313,905 |
   0.4 mg/kg every 6 weeks | $32,200 | 0.177 | $181,595 |
   0.4 mg/kg every 8 weeks | $26,335 | 0.177 | $148,518 |