Table 2 Correlation among major variables

Objective variables

Tidal volume

1

C length

−0.223^*

(0.012)

Peak Pressure (PP)

0.744^***

(< 0.001)

ln (apex sealing force)

0.246^**

(0.006)

Bottom sealing force

−0.165

(0.065)

Left sealing force

−0.068

(0.449)

Right sealing force

.409^***

(< 0.001)

General characteristics

Clinical practice satisfaction

−0.054

(0.548)

Major satisfaction

0.039

(0.666)

Experience of BVM ventilation

0.230^*

(0.010)

Acquired certificate

0.299^*

(0.001)

BMI (kg/m²)

0.100

(0.269)

Subjective variables

Knowledge

0.205^*

(0.022)

Performance confidence

0.144

(0.110)