Table 2 Sensitivity analysis
From: An economic analysis of varicella immunization in the Singapore military
Variable | Change in cost savings as a result of intervention Positive value favors intervention | Sensitivity |
|---|---|---|
Income at year 2007 | +$24.12 per $1 increment of income | Higher income means more valuable man-days. With more than 1600 MD savings per year, each dollar increase is a significant impact on the cost effectiveness of the intervention. |
Days lost from outbreaks | +$5,704 per man day (from 100 MD to 101 MD) | Sensitive. Although there are few outbreaks, each outbreak represents a significant cost. Please refer to Fig. 1 to see how the vaccination program changed cost of handling the disease over time. |
Estimated % with side effects | -$2600 per 0.1 % (from 5 % to 5.1 %) | Moderately sensitive. Due to the large number of vaccinations, increased percentage side effects will have an impact on the number of medical leave taken. |
Consultation fee and medications | -$201.7 per $1 increment (from $34.5 to $35.5) | Changing consultation fee and medication cost barely affects the model. |
Wage growth | +$406.3 per 0.1 % increase (from 6.09 % to 6.19 %) | Not sensitive. It takes a big change in wage growth to change the results. |
Discount rate | +$3,593 (from 0.1025 % to 0.1125 % per month). 0.01 % per month is approximately equal to 16–17 basis points | Not sensitive. It requires a significant shift in 5Y risk-free return to change the result of the analysis. |