Table 3 Anesthetic-/operative-specific potential risk factors and prognosis-related variables for unplanned reintubation caused by AAC

CL grade [n (%)]

0.002^*

 1

19(52.78)

102(70.83)

 2

9(25.00)

36(25.00)

1.34(0.56 to 3.23)

0.512

 3

6(16.67)

3(2.08)

10.74(2.47 to 46.69)

0.002

 Laryngeal mask

2(5.56)

3(2.08)

3.58(0.56 to 22.88)

0.178

Anesthesiologist seniority of (yr) [n (%)]

0.879^*

  > 10

21(58.33)

86(59.72)

0.94(0.45 to 1.98)

  ≤ 10

15(41.67)

58(40.28)

Surgical type [n (%)]

< 0.001^*

 Head and neck

12(33.33)

40(27.78)

2.01(0.72 to 5.60)

0.180

 Thoracic

12(33.33)

10(6.94)

8.06(2.54 to 25.58)

< 0.001

 Laparoscopic

5(13.89)

47(32.64)

0.71(0.21 to 2.41)

0.588

 Others

7(19.44)

47(32.64)

RBC infusion [n (%)]

0.206^*

 Yes

3(8.33)

5(3.47)

2.53(0.57 to 1.11)

 No

33(91.67)

139(96.53)

FFP infusion [n (%)]

< 0.001^*

 Yes

5(13.89)

1(0.69)

23.07(2.60 to 204.42)

 No

31(86.11)

143(99.31)

Fluid load (ml kg⁻¹) [n (%)]

0.009^*

  < 20

14(38.89)

96(66.67)

 20 ~ 40

18(50.00)

40(27.78)

3.09(1.40 to 6.80)

0.005

  > 40

4(11.11)

8(5.55)

3.43(0.91 to 12.90)

0.068

Intubation duration (min)(IQR)

139.5(104.2, 266.0)

132.0(83.5, 189.5)

52.13(3.63 to 100.64)

0.049⁺

WBC count (×10⁹/L)

7.35 ± 2.80

6.26 ± 1.96

1.08(0.29 to 1.88)

0.008^#

PLT count (×10⁹/L)

251.08 ± 80.21

231.87 ± 66.75

19.22(−6.38 to 44.81)

0.140^#

RBC count (× 10¹²/L)

4.49 ± 0.59

4.47 ± 0.49

0.02(−0.17 to 0.20)

0.868^#

ALT (U/L)

20.39 ± 12.30

23.13 ± 28.34

0.65(0.14 to 3.03)

0.573^#

ALB (g/L)

42.08 ± 4.37

43.58 ± 4.57

−1.50(−3.16 to 0.17)

0.079^#

Ccr (ml/min) [n (%)]

 Mean

81.03 ± 28.83

102.62 ± 29.04

< 0.001^#

  < 70

14(38.89)

14(9.72)

5.92(2.48 to 14.08)

< 0.001^*

  ≥ 70

22(61.11)

130(90.28)

Postoperative hospital days (IQR)

8.5(4.0 to 12.0)

4.0(2.0 to 7.0)

5.26(1.57 to 8.95)

< 0.001⁺

Postoperative ICU days (IQR)

1.0(0.0 to 5.0)

0.0(0.0 to 0.0)

3.94(1.69 to 6.18)

< 0.001⁺