. 2019 Feb 13;14(2):e0211792. doi: 10.1371/journal.pone.0211792

Table 5. The comparison between video-assisted and telephone DA-CPR for different components of CPR quality in 6 studies.

	Correct chest compression depth	Correct chest compression rate	Full chest recoil	Minimal interrupted chest compression	Correct hand position	Shorter time to start chest compression	Ventilation
Number of studies showing video-assisted DA-CPR is superior	2^17,20	4^17,20,39,50	0	1³⁹	3^17,39,50	1⁵⁰	2^28,39
Number of studies showing telephone DA-CPR is superior	0	0	0	2^20,50	0	3^20,28,39	1¹⁷
Number of studies showing both methods were the same	3^39,46,50	1⁴⁶	1⁴⁶	1⁴⁶	2^20,46	2^17,46	1⁴⁶
Number of studies without measurement	1²⁸	1²⁸	5^{17,20,28,39,50}	2^17,28	1²⁸	0	1²⁰