Table 2.

Multi-way sensitivity analyses of effect of public place defibrillators

	Original	Changed to	Cost/QALY	Change
Basic model			£41 146
Increase in QALYs:
No of arrests in Scotland over 7 years	38	50	£23 689	−42%
Utility of survivors	0.72	0.93
Discount applied to health benefits	1.5%	0%
Decrease in QALYs:
No of arrests in Scotland over 7 years	38	26	£67 548	64%
Discount applied to health benefits	1.5%	6%
Reduction in costs of defibrillators:
No of defibrillators (but same benefit)	31	21	£17 679	−57%
Unit cost of defibrillators	£2500	£1250
Increase in QALYs plus reduction in defibrillator costs:
No of arrests in Scotland over 7 years	38	50	£13 776	−67%
Utility of survivors	0.72	0.93
Discount applied to health benefits	1.5%	0%
Unit cost of defibrillators	£2500	£1250

QALY=quality adjusted life year.