Table 2. Sufficient CC depth ratio, CC quickness and complete recoil rate in each cycle over 30 min CPR.

Sufficient (>5cm) CC ratio -%,median (IQR Q1-Q3)
Group	CC 1	CC2	CC 3	CC 4	CC 5	CC 6	CC 7	CC 8	P—value
A	71 (14–97)	54 (6–88)	38 (10–84)	40 (3–91)	21 (2–86)	11 (1–75)	16 (0–92)	15 (2–85)	0.23
B	35 (11–87)	29 (3–86)	30 (1–99)	16 (0–89)	29 (1–98)	N/A	N/A	N/A	0.97
C	52 (23–99)	78 (13–99)	90 (5–100)	61 (5–99)	N/A	N/A	N/A	N/A	0.58
D	49 (6–96)	33 (5–97)	60 (84–97)	N/A	N/A	N/A	N/A	N/A	0.85
CC quickness-times, median (IQR Q1-Q3)
	CC 1	CC2	CC 3	CC 4	CC 5	CC 6	CC 7	CC 8
A	119 (109–123)	121 (110–126)	121	120	121	121	123	120	0.93
			(111–128)	(113–127)	(115–131)	(113–131)	(115–131)	(113–129)
B	117	119	119	120	119	N/A	N/A	N/A	0.62
	(107–120)	(113–124)	(112–126)	(114–125)	(114–127)
C	118	120	122	123	N/A	N/A	N/A	N/A	0.89
	(112–124)	(116–127)	(116–130)	(117–128)
D	117	121	123	N/A	N/A	N/A	N/A	N/A	0.22
	(112–123)	(112–126)	(113–129)
Recoil rate -%,median (IQR Q1-Q3)
	CC 1	CC2	CC 3	CC 4	CC 5	CC 6	CC 7	CC 8
A	98 (53–100)	99 (83–100)	98 (89–100)	99 (66–100)	98 (69–100)	99 (94–100)	99 (81–100)	97 (57–100)	0.84
B	99 (94–100)	99 (92–100)	95 (64–100)	99 (86–100)	100	N/A	N/A	N/A	0.89
					(78–100)
C	99 (92–100)	99 (93–100)	100	100	N/A	N/A	N/A	N/A	0.88
			(76–100)	(91–100)
D	99 (83–100)	98 (79–100)	98 (67–100)	N/A	N/A	N/A	N/A	N/A	0.74

CC, chest compression; IQR, interquartile range