Table 3.

Compression Rate and Fraction of Total CPR Interval Spent on Compressions, Ventilations, and Other Activities by Type of CPR Among Patients Who Received Telecommunicator CPR

	30:2 Compressions and ventilations	Compression only	All cases
Total CPR interval* in seconds, median (IQR)	211 (143–258)	206 (107–294)	207 (133–270)
Compression fraction, mean (SD)	43% (19)	88% (25)	54% (28)
Ventilation fraction, mean (SD)	25% (14)	…	20% (16)
Interruption fraction†, mean (SD)	14% (16)	6% (17)	12% (17)
Unknown action fraction‡, mean (SD)	17% (22)	6% (17)	15% (21)
Compressions/minute, median (IQR)	92 (82–106)	100 (86–109)	93 (82–107)

^*Total CPR interval begins with first compression or ventilation, whichever occurs first, and ends with last compression, ventilation, or the end of the 911 call.

^† Interruptions in CPR were defined as any interval ≥5 seconds in which the bystander was heard performing activities other than ventilations or compressions.

^‡ Unknown actions were defined as any interval ≥5 seconds in which the action of the caller could not be determined from the 911 audio.

CPR indicates cardiopulmonary resuscitation; and IQR, interquartile range.