**Cost Parameters Used:**- Pathologist hourly rate: $ 100 - IHC cost per test: $ 150 - Consultation cost: $ 200 - Estimated annual cases: 1000 9 Cost-Effectiveness Analysis
10 Cost-Effectiveness Analysis
10.1 Time Cost Analysis
Economic Impact of Diagnosis Time Changes
Converting diagnosis time changes into economic costs based on pathologist salary and workload assumptions.
10.1.1 Assumptions for Cost Calculations
10.1.2 Time Cost Per Case
Note for Pathologists: The following table quantifies the difference in time spent per case with vs. without AI, translated into economic cost based on the pathologist’s hourly rate.
| Pathologist | Time_Minutes_Without AI | Time_Minutes_With AI | Cost_Per_Case_Without AI | Cost_Per_Case_With AI | Time_Difference_Minutes | Cost_Difference |
|---|---|---|---|---|---|---|
| P1 | 0.65 | 0.76 | 1.09 | 1.27 | 0.10 | 0.17 |
| P2 | 0.78 | 0.73 | 1.30 | 1.21 | -0.06 | -0.09 |
| P3 | 0.77 | 0.67 | 1.28 | 1.12 | -0.09 | -0.15 |
| P4 | 0.76 | 0.83 | 1.26 | 1.38 | 0.07 | 0.12 |
**Projected Annual Impact (Average Across Pathologists):**- Time difference per year: 8 minutes ( 0.1 hours)- Cost difference per year: $ 13
*Note: Positive values indicate increased time/cost with AI*10.2 IHC Cost Savings
Reduction in Immunohistochemistry Costs
Calculating cost savings from reduced IHC requests when AI assistance is available.
Note for Pathologists: This table estimates the cost savings achieved by reducing the need for Immunohistochemistry (IHC) tests when AI assistance is used.
| Pathologist | Without AI | With AI | Rate_Reduction | Annual_IHC_Reduction | Annual_Cost_Savings |
|---|---|---|---|---|---|
| P1 | 14.27 | 4.22 | 10.05 | 100.50 | 15074.44 |
| P2 | 4.47 | 2.23 | 2.23 | 22.33 | 3349.88 |
| P3 | 4.47 | 2.48 | 1.99 | 19.85 | 2977.67 |
| P4 | 9.93 | 2.36 | 7.57 | 75.68 | 11352.36 |
**Average Annual IHC Cost Savings:**- Estimated IHC tests avoided per year: 55 - Estimated cost savings: $ 8189 10.3 Consultation Cost Savings
Reduction in Consultation Costs
Calculating cost savings from reduced expert consultation requests when AI assistance is available.
Note for Pathologists: This analysis projects the cost savings from decreased need for expert consultations due to increased diagnostic confidence with AI.
| Pathologist | Without AI | With AI | Rate_Reduction | Annual_Consult_Reduction | Annual_Cost_Savings |
|---|---|---|---|---|---|
| P1 | 2.73 | 1.36 | 1.36 | 13.65 | 2729.53 |
| P2 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| P3 | 0.74 | 0.00 | 0.74 | 7.44 | 1488.83 |
| P4 | 0.12 | 0.00 | 0.12 | 1.24 | 248.14 |
**Average Annual Consultation Cost Savings:**- Estimated consultations avoided per year: 6 - Estimated cost savings: $ 1117 10.4 Total Cost-Benefit Analysis
Comprehensive Economic Assessment
Combining all cost factors to determine net economic impact of AI implementation.
Note for Pathologists: A comprehensive summary aggregating time costs and savings from reduced IHC and consultations to show the net economic impact.
| Category | Annual_Savings | Impact |
|---|---|---|
| Pathologist Time | -13 | Cost |
| IHC Reduction | 8189 | Savings |
| Consultation Reduction | 1117 | Savings |
| Total | 9293 | Savings |
**Net Annual Economic Impact:**Net Annual Savings: $ 9293
*The AI system provides net economic benefit through reduced ancillary testing, despite potential increases in diagnosis time.*10.5 Break-Even Analysis
AI System Cost Justification
Determining the maximum annual cost for AI licensing/implementation that would still result in net savings.
**AI System Cost Threshold:**Maximum annual AI system cost for break-even: $ 9293
If the annual cost of the AI system (licensing, maintenance, training, etc.) is below this threshold, the implementation provides positive economic value.10.6 Efficiency Metrics
Workflow Efficiency Indicators
Additional metrics to assess operational efficiency beyond direct costs.
Note for Pathologists: Efficiency metrics comparing case throughput and definitive diagnosis rates between the two workflows.
| Metric | Value |
|---|---|
| Average cases per hour (without AI) | 81.11 |
| Average cases per hour (with AI) | 80.29 |
| Suspicious diagnosis rate (without AI) | 9.18 |
| Suspicious diagnosis rate (with AI) | 3.16 |
| Definitive diagnosis rate (without AI) | 90.82 |
| Definitive diagnosis rate (with AI) | 96.84 |
10.7 Sensitivity Analysis
Testing Alternative Cost Assumptions
Evaluating how results change under different cost assumptions.
Note for Pathologists: Sensitivity analysis testing how the net benefit changes under different economic scenarios (Conservative, Base, Optimistic).
| Scenario | Pathologist_Rate | IHC_Cost | Consult_Cost | Net_Benefit |
|---|---|---|---|---|
| Conservative | 80 | 100 | 150 | 6286 |
| Base Case | 100 | 150 | 200 | 9293 |
| Optimistic | 120 | 200 | 250 | 12299 |
10.8 Summary
Economic Impact Summary
The cost-effectiveness analysis considers: 1. Direct pathologist time costs 2. IHC test reduction savings 3. Consultation reduction savings 4. Net economic impact
Important Considerations: - These calculations use estimated cost parameters - Actual costs vary by institution and region - Indirect benefits (accuracy, error reduction, liability) are not fully quantified - Long-term efficiency gains from learning curves may further improve economics
This chapter analyzes the economic impact of AI implementation, including time savings/costs, IHC reduction, consultation reduction, and overall workflow efficiency.