Table 4: Relationship between N vs. B ratio, N vs. P ratio and eachVAE preventive measure.
N vs. B ratio: Nurse vs. bed ratio; N vs. P ratio: Nurse vs. MV patient ratio.
D vs. B ratio: Doctor vs. bed ratio; D vs. P ratio: Doctor vs. MV patient ratio.
B: Benzodiazenpines; LTVV: Low tidal volume ventilation; GRV:Gastric remaining volume; S: Sucralfate; D: dexmedetomidine.
Apply the chi-square test to calculate the relationship between each preventive measure and N vs. B and N vs. P ratio.
*P<0.05
N vs. B ratio N vs. P ratio D vs. B ratio D vs. P ratio
<2 >2 P <1 >1 P <5 >5 P <2 >2 P
Oral care
Method
Brushing 4 4 0.414 5 3 0.186 5 3 0.539 4 4 0.838
Not brushing 13 11 17 7 12 12 13 11
Frequency
<4 times a day 10 13 0.049* 15 8 0.874 11 12 0.337 11 12 0.337
>4 times a day 7 2 7 2 6 3 6 3
SAT
Implementation
YES 12 14 0.365 20 6 0.038* 16 10 0.047* 15 11 0.281
NO 4 2 2 4 1 5 2 4
Frequency
Daily 9 4 0.018* 8 5 0.690 7 6 0.420 6 7 0.234
Other 3 10 10 3 9 4 9 4
SBT
Implementation
YES 15 14 0.544 19 10 0.935 14 15 0.087 16 13 0.471
NO 2 1 3 0 3 0 1 2
Frequency
Daily 2 2 0.945 3 1 0.849 2 2 0.941 3 1 0.390
Other 13 12 16 9 12 13 13 12
Sedative
Usage
B<50% 14 7 0.582 15 6 0.638 15 6 0.004* 13 8 0.169
B>50% 7 4 8 3 2 9 4 7
Fluid balance control
Implementation
YES 15 15 0.144 20 10 0.555 16 14 0.927 16 14 0.927
NO 2 0 2 0 1 1 1 1
Indicator
Negative 5 3 0.825 7 1 0.589 7 1 0.024* 5 3 0.544
Non-negative 10 12 13 9 9 13 11 11
LTVV
Implementation
YES 14 14 0.285 19 9 0.387 15 13 0.893 15 13 0.893
NO 3 1 3 1 2 2 2 2
Setting
≤7mL/kg 1 2 0.630 2 1 0.122 3 0 0.088 1 2 0.457
7~10mL/kg 13 12 17 8 12 13 14 11
Anti-ulcer drugs
Implementation
YES 13 10 0.411 16 7 0.595 14 9 0.160 12 11 0.863
NO 4 5 6 3 3 6 5 4
Usage
S>1/3 5 1 0.123 4 2 0.858 5 1 0.190 5 1 0.076
S<1> 8 9 12 5 9 8 7 10