Table 5 Stratified Analysis of Total Bacterial Count, BOAS Score, and VAP in patients with different disease risk levels. Stratified analysis was performed based on the median APACHE II score of 16, following methods used in other studies [22]. Patients were divided into subgroups: low-risk (APACHE II < 16) and medium-to-high risk (APACHE II ≥ 16)
|  | Low risk APACHE II<16(n = 54) | Moderate and high risk APACHE II≥16(n = 61) | |||
|---|---|---|---|---|---|
Characteristics | DETT group (n = 25) | ETT group (n = 29) | DETT group (n = 33) | ETT group (n = 28) | |
Bacteria count (CFU/mL,\(\bar x\)±s) | 4.50 ± 1.26 × 108 | 7.09 ± 1.37 × 108 | 4.33 ± 1.42 × 108 | 6.72 ± 1.29 × 108 | |
t | -7.158 | -6.842 | |||
pvalue | <0.001 | <0.001 | |||
BOAS [scores, M(P25, P75)] | 5.00(5.00,5.00) | 5.00(5.00,6.00) | 5.00(5.00,5.50) | 5.50(5.00,6.00) | |
Z | -1.899 | -2.339 | |||
pvalue | 0.058 | 0.019 | |||
VAP, n(%) | 3(12.00) | 4(13.79) | 2(6.06) | 9(32.14) | |
χ2 | - | 6.972 | |||
pvalue | 0.100a | 0.008 | |||