Differences between manual CPR and corpuls cpr in regard to quality and outcome: study protocol of the comparing observational multi‐center prospective registry study on resuscitation (COMPRESS)

Table 1 Demographic and process data of the four EMS participating in the COMPRESS-trial. Hours on duty: Sum of hours on duty of all physician staffed EMS units in that region per year

Site	Population covered	Area covered (km²)	Population density (inhabitants/km²)	Hours on duty of the physician staffed unit (h)	CPR incidence (1/100,000 inhabitants and year)	estimated number of attempted CPR per year
Aachen	255,967	162	1,580	17,520	52.7	135
Dortmund	601,000	280	2,146	52,560	65.9	396
Göppingen	254,618	642	397	29,930	67.2	171
Gütersloh	371,429	969	383	38,532	54.4	202

ISSN: 1757-7241