Table 1. Simulation model inputs.
Model Input | Point Estimate | Low | High | Data Source | Distribution |
---|---|---|---|---|---|
Exenatide 2 mg | |||||
Effectiveness | |||||
DURATION-6 Trial Reduction in HbA1c | 1.28% | 1.18% | 1.38% | [9] | Beta |
Meta-Analysis Reduction in HbA1c | 1.15% | 1.00% | 1.31% | [10] | Beta |
Discontinuation Rate | |||||
Before Week 4 | 0% | 0% | 1% | [9] | Beta |
After Week 4 | 13.23% | 10.59% | 15.88% | [9] | Beta |
Drug Cost (2014 $USD) | |||||
Monthly cost of exenatide 2 mg (4 Pack) | $407 | $367 | $448 | WAC | Normal |
Adverse Event Rates | |||||
Patients Experiencing 1+ Adverse Events | 61.39% | 49.11% | 73.67% | [9] | Beta |
Gastrointestinal Disorders | 39.93% | 31.94% | 47.92% | [9] | Beta |
Liraglutide 1.8 mg | |||||
Effectiveness | |||||
DURATION-6 Trial Reduction in HbA1c | 1.48% | 1.38% | 1.58% | [9] | Beta |
Meta-Analysis Reduction in HbA1c | 1.18% | 1.04% | 1.32% | [10] | |
Discontinuation | |||||
Before Week 4 | 3.33% | 2.66% | 4.00% | [9] | Beta |
After Week 4 | 9.78% | 7.82% | 11.74% | [9] | Beta |
Drug Cost (2014 $USD) | |||||
Monthly cost of liraglutide 1.8 mg (30 Pack) | $536 | $482 | $589 | WAC | Normal |
Needle cost | $9 | $8 | $10 | Assumption | Normal |
Adverse Event Rates | |||||
Patients Experiencing 1+ Adverse Events | 64.89% | 51.91% | 77.87% | [9] | Beta |
Gastrointestinal Disorders | 54.7% | 43.78% | 65.66% | [9] | Beta |
Other Costs | |||||
Adverse Event Costs (2014 $USD) | |||||
Gastrointestinal Disorders | $1,113 | $890 | $1,335 | Expert Opinion | Normal |
HbA1c = glycated hemoglobin; $USD = United States dollars; WAC = wholesale acquisition cost