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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

From: 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)

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