The Effect of the Duration of Basic Life Support Training on the Learners’ Cardiopulmonary and Automated External Defibrillator Skills
Table 3
Comparing cardiopulmonary resuscitation quality among all participants according to program level.
Quality variables during CPR
Program level
value
1 ()
2 ()
3 ()
4 ()
Between 1 and
Between 3 and
Among 1–
Number of total compressions
225.0 (207.0–243.0)
216.0 (196.0–232.0)
150.0 (129.2–150.0)
148.0 (124.5–151.0)
0.018
0.734
<0.001
Average compression rate (per min)
122.0 (113.5–130.5)
120.0 (109.0–126.0)
120.0 (114.0–126.7)
119.0 (113.5–125.0)
0.037
0.467
0.110
Average compression depth (mm)
51.0 (46.0–56.0)
52.0 (46.0–56.0)
51.0 (44.0–57.0)
55.0 (50.0–59.0)
0.367
0.003
Proportion of adequate compression depth (%)
63.2 (19.0–97.9)
82.5 (25.5–98.6)
68.1 (8.0–98.7)
91.7 (45.2–98.7)
0.252
0.023
0.053
Proportion of adequate recoil (%)
100.0 (98.9–100.0)
100.0 (99.5–100.0)
100.0 (100.0–100.0)
100.0 (99.3–100.0)
0.050
0.170
0.006
Proportion of overall adequate compression (%)
27.0 (2.8–76.1)
42.7 (8.8–85.6)
30.9 (3.2–69.3)
74.4 (24.8–92.9)
0.094
<0.001
<0.001
Number of mouth-to-mouth breaths
—
—
8.0 (8.0–10.0)
8.0 (8.0–10.0)
—
0.368
—
Average ventilation volume (mL)
—
591.0 (326.0–886.0)
648.0 (354.5–902.5)
—
0.733
—
Proportion of adequate mouth-to-mouth breathing (%)
—
—
25.0 (0–44.4)
20.0 (0–50.0)
—
0.825
—
Hands-off time (s)
15.0 (13.0–17.0)
15.0 (13.0–17.0)
52.0 (48.0–56.0)
50.0 (47.0–55.5)
0.420
0.093
<0.001
Post hoc paired comparisons between the levels were performed using the Mann-Whitney U test with Bonferroni corrections (statistical significance was ). Calculated using the Kruskal-Wallis method. Post hoc paired comparisons between levels 1 and 4 () and levels 2 and 4 (). Post hoc paired comparisons between levels 1 and 4 (). CPR: cardiopulmonary resuscitation.
