Table 4 Multivariate Cox hazard analysis for patients treated by tracheostomy
The timing of tracheostomy | From intubation to tracheostomy | From ICU admission to tracheostomy | ||||
|---|---|---|---|---|---|---|
HR1(95%CI) | HR2(95%CI) | HR3(95%CI) | HR4(95%CI) | |||
Grouping criteria I | ||||||
 ≤ 5d | 0.53(0.17,1.70) | NA | 0.26(0.08,0.89)* | NA | ||
 5 < d ≤ 10 | Reference | NA | Reference | NA | ||
 > 10d | 0.86(0.37,1.96) | NA | 1.33(0.56,3.14) | NA | ||
Grouping criteria II | ||||||
 ≤ 7d | NA | 1.3( 0.54,3.31) | NA | 0.91(0.36,2.34) | ||
 7 < d ≤ 14 | NA | Reference | NA | Reference | ||
 > 14d | NA | 0.89(0.36,2.19) | NA | 1.67(0.65,4.31) | ||
Age, y | ||||||
 ≤ 50 | Reference | |||||
 50–60 | 4.14(0.63,27.3) | 4.32 (0.66, 28.4) | 3.4(0.55,21.2) | 3.96(0.58,26.8) | ||
 60–70 | 1.67(0.23,12.1) | 1.72( 0.24, 12.5) | 1.51(0.22,10.4) | 1.70(0.23,12.6) | ||
 70–80 | 2.33(0.34,15.9) | 2.55(0.38,17.1) | 2.12(0.33,13.6) | 2.40(0.34,16.7) | ||
 > 80 | 11.7(1.97,69.8) ** | 11.3( 1.89,67.0) ** | 9.54(1.69,53.8)* | 11.0(1.80,67.5)** | ||
Sex | ||||||
 Female | Reference | |||||
 Male | 1.30(0.61,2.80) | 1.26( 0.59, 2.71) | 1.20(0.56,2.58) | 1.18(0.55,2.53) | ||
Type of tracheostomy | ||||||
 Percutaneous | Reference | |||||
 Surgical | 1.30(0.67,2.51) | 1.49(0.77,2.90) | 1.32(0.70,2.51) | 1.29(0.68,2.45) | ||
Length of MV | ||||||
 Total | 1.05(1.01–1.10) * | 1.07( 1.02,1.11)** | 1.05(1.00,1.09)* | 1.04(0.99,1.09) | ||
 After tracheostomy | 0.94(0.91,0.98) ** | 0.93(0.90,0.97)** | 0.96(0.92,0.99)* | 0.96(0.91,0.99)* | ||
Length of sedation | ||||||
| Â | 1.02(0.99,1.03) | 1.02(1.0,1.04) | 1.01(0.99,1.03) | 1.01(0.99,1.03) | ||
 Duration of ICU stay | 0.91(0.89,0.93) *** | 0.91( 0.89,0.93) *** | 0.89(0.87,0.92) *** | 0.91(0.88,0.93) *** | ||