Recognition of out-of-hospital cardiac arrest during emergency calls — a systematic review of observational studies

Table 2 Main outcome measures, describing the incidence of OHCA in the study population, sensitivity and PPV

Author, year of publication	Incidence^a(OHCA analysed/100,000/year)	Sensitivity of OHCA recognition	PPV of OHCA recognition
[26]	32.5	20.0%	N/A
[7]	32.9	71.0%	*76.0%
[23]	120.5	68.9%	63.5%
[27]	55.7	71.0%	N/A
[22]	86.8	76.7%	58.4%
[19]	N/A	68.3%	65.0%
[21]	22.5	77.0%	N/A
[21]	49.5	82.0%	N/A
[29]	12.4	82.3%	N/A
[30]	6.1	79.4%	N/A
[6]	35.3	80.0%	N/A
[14]	30.0	96.9%	97.9%
[25]	129.3	*82.9%	*85.3%
[15]	60.0	14.1%	N/A
[28]	30.3	61.0%	N/A
[24]	40.8	65.9%	67.4%

^a = Value calculated from information in the study. US: United States, NO: Norway, OHCA: Out-of-Hospital Cardiac Arrest, PPV: Positive predictive value, N/A: Not available