. 2015 May;65(5):556–563.e6. doi: 10.1016/j.annemergmed.2014.12.028

Table E2.

Scenarios for unit costs of out-of-hospital CPAP.

Source	Incidence of Eligible Patients per 100,000	Annual Eligible Patients in an Ambulance Service	Unit Cost of Out-of-Hospital CPAP, £ ($)^∗
Spijker et al^¹	3.5	175	1,346.76 (1,952.80)
Aguilar et al^²	7.3	365	744.58 (1,096.64)
Luhr et al^³	17.8	890	417.40 (605.20)
Hubble et al^⁵	34.2	1,700	309.02 (448.08)
BTS audit^⁴	36.1	1,800	302.40 (438.48)
STH ED data	40.8	2,000	291.15 (422.15)

BTS, British Thoracic Society; STH, Sheffield Teaching Hospital.

^∗

Using the formula unit cost=£189.93+£202,446/N ($275.5+$293,546/N), where N is the number of patients per year.