Table 3.

The comparison in the performance difference on two interventions by groups

	FSP OFF	FSP ON	p Value	Feedback OFF	Feedback ON	p Value
Depth accuracy (%)
BLS-ATS	35.2 (16.8–85.3)	37.6 (21.9–57.8)	0.56	22.0 (7.3–36.2)	71.3 (35.4–86.5)	0.002*
BLS-EMS	40.6 (1.9–71.2)	26.1 (6.9–56.7)	0.64	9.3 (0.4–53.2)	45.1 (18.6–69.7)	0.06
ACLS-EMS	38.2 (3.2–79.2)	37.5 (18.9–69.7)	0.82	22.0 (4.4–59.9)	58.8 (17.6–78.8)	0.18
Depth (cm)
BLS-ATS	5.4 (4.9–6.1)	5.1 (4.5–5.2)	0.05	4.9 (4.4–5.2)	5.4 (5.1–5.7)	0.04*
BLS-EMS	5.8 (5.1–6.2)	5.1 (4.2–5.8)	0.16	5.4 (4.2–6.0)	5.5 (5.0–5.9)	0.49
ACLS-EMS	6.1 (5.7–6.5)	5.6 (4.7–6.1)	0.06	6.0 (5.1–6.5)	5.8 (5.4–6.3)	0.69
Rate accuracy (%)
BLS-ATS	45.1 (14.3–89.8)	61.5 (17.2–84.3)	0.73	38.9 (10.3–92.8)	61.3 (26.4–72.1)	0.86
BLS-EMS	64.9 (14.3–79.3)	57.7 (39.4–85.1)	0.82	70.0 (7.4–87.5)	57.8 (50.5–70.9)	0.60
ACLS-EMS	0.0 (0.0–71.7)	14.3 (0.1–68.2)	0.42	0.2 (0.0–76.7)	30.5 (0.0–64.2)	0.76
Rate (cpm)
BLS-ATS	110 (100–125)	106 (100–123)	0.69	112 (97–124)	105 (100–125)	0.95
BLS-EMS	104 (100–125)	106 (100–120)	1.00	110 (102–126)	101 (99–115)	0.17
ACLS-EMS	137 (105–141)	130 (104–138)	0.58	136 (112–141)	126 (100–138)	0.29

Wilcoxon test, median (IQR).

FSP ON includes both FSP and FSP+feedback conditions, and FSP OFF includes both baseline and feedback conditions.

Feedback ON includes both feedback and FSP+feedback conditions, and feedback OFF includes both baseline and FSP conditions.

*p <0.05 significant.

ACLS, advanced cardiovascular life support; ATS, athletic training students; BLS, basic life support; cpm, compression per min; EMS, emergency medical service; FSP, football shoulder pads.