Table 5.

Intervention Costs, Estimated Cost and QALY Gains, and Estimated Cost per QALY Gained (discounted to present value using a 3% discount rate unless otherwise stated; in 2010 US Dollars; estimates for boarders are not shown because boarding cost more than tuition support without boarding but it did not improve outcomes.)

	All	Non-Boarders
Cost	1,474*	973*
Return on Added Education (RAE)
Low RAE Estimate	395	395
Medium RAE Estimate	1,028	1,028
High RAE Estimate	1,384	1,384
HIV Treatment Savings	299	299
Net Cost (Cost – RAE – HIV Savings)
Probabilistic Mean Estimate (Best)	2	(502)
Standard Deviation	682	470
Probabilistic Median Estimate	(27)	(453)
Low RAE Estimate	780	279
Medium RAE Estimate	147	(354)
High RAE Estimate	(209)	(710)
QALY Gain
QALY Gain as Student	0.05	0.05
QALY Gain from HIV Reduction	0.337	0.337
Total, Base Case	0.387	0.387
Probabilistic Best Estimate of Total	0.36	0.36
Standard Deviation	0.23	0.23
Cost per QALY Gained (Net Cost/QALY Gain)
At a 3% Discount Rate
Probabilistic Median Estimate (Best)	(120)	(1,327)
Computed from Probabilistic Means	6	(1,394)
Low RAE Estimate	2,016	721
Medium RAE Estimate	380	(915)
With Thai QALY Scoring	373	(895)
If 2010 QALY Gains Persist	324	(778)
High RAE Estimate	(540)	(1,835)
At a 7% Discount Rate
Low RAE Estimate	3,880	2,009
Medium RAE Estimate	1,805	(66)
High RAE Estimate	−912	(2,782)

^*Unlike the estimates in Table 2, these cost estimates have been discounted to present value.