Table 2 Characteristics of patients at baseline
Characteristics | DETT group (n = 58) | ETT group (n = 57) | Z/χ2 | p value |
|---|---|---|---|---|
Indication for intubation, n(%) | Â | Â | Â | 0.861a |
 Respiratory failure | 27(46.55) | 30(52.63) |  |  |
 Altered mental status | 22(37.93) | 18(31.58) |  |  |
 Airway obstruction | 6(10.34) | 7(12.28) |  |  |
 Haemodynamic instability | 3(5.17) | 2(3.51) |  |  |
Type of mechanical breaths, n (%) | Â | Â | 1.465 | 0.226 |
 Volume control | 36(62.07) | 29(50.88) |  |  |
 Pressure control | 22(37.93) | 28(49.12) |  |  |
PEEP[cmHâ‚‚O, M(P25, P75)] | 4.00(4.00,5.25) | 5.00(4.00,5.50) | -0.669 | 0.504 |
Sex, n(%) | Â | Â | 0.076 | 0.783 |
 Male | 46(79.31) | 44(77.19) |  |  |
 Female | 12(20.69) | 13(22.81) |  |  |
Age[year, M(P25, P75)] | 68.50(55.00,77.00) | 71.00(62.50,79.00) | -1.548 | 0.122 |
Occupation, n (%) | Â | Â | Â | 0.513a |
 Farmer | 30(51.72) | 27(47.37) |  |  |
 Worker | 3(5.17) | 6(10.53) |  |  |
 Retired | 15(25.86) | 18(31.58) |  |  |
 Freelance | 10(17.24) | 6(10.53) |  |  |
BMI[kg/m², M(P25, P75)] | 22.92(18.65,24.16) | 22.49(20.72,24.46) | -0.523 | 0.601 |
APACHE II[scores, M(P25, P75)] | 16.00(12.00,22.00) | 15.00(11.00,20.00) | -0.462 | 0.644 |
Consciousness, n (%) | Â | Â | 0.450 | 0.502 |
 Conscious | 31(53.45) | 34(59.65) |  |  |
 Unconscious | 27(46.55) | 23(40.35) |  |  |
Smoking status, n (%) | Â | Â | 0.028 | 0.866 |
 Yes | 44(75.86) | 44(77.19) |  |  |
 No | 14(24.14) | 13(22.81) |  |  |
Comorbidities *, n (%) | Â | Â | 2.708 | 0.100 |
 Yes | 44(75.86) | 50(87.72) |  |  |
 No | 14(24.14) | 7(12.28) |  |  |
ICU Length of Stay[d, M(P25, P75)] | 7.50(6.00,9.00) | 8.00(6.00,10.00) | -0.254 | 0.800 |
The number of days of intubation[d, M(P25, P75)] | 6.00(4.75,7.00) | 5.00(4.00,7.00) | -1.762 | 0.078 |
Antibiotic days[d, M(P25, P75)] | 7.00(4.50,9.00) | 6.00(0.00,8.00) | -0.953 | 0.341 |
Saliva volume[ml, M(P25, P75)] | 2.90(2.24,3.50) | 2.86(2,21,3.27) | -0.655 | 0.512 |
Bacterial count[CFU/mL, M(P25, P75)] | 0.98(0.89,1.11)×108 | 1.02(0,90,1.17)×108 | -0.907 | 0.365 |