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Table 2 Vital signs, arterial blood gas and laboratory findings before weaning

From: Mean platelet volume is useful for predicting weaning failure: a retrospective, observational study

Variable

Weaning failure

(n = 54)

Weaning success

(n = 207)

P

Vital signs

 RR, breaths/min

21.4 ± 4.49

19.7 ± 4.75

0.020

 SpO2, %

98(96–100)

99(98–100)

0.003

 HR, beats/min

92(79–101)

86(77–97)

0.089

 SPB, mmHg

124(112–131)

131(118–144)

0.011

Arterial blood gas

 PH

7.45(7.43–7.47)

7.45(7.45–7.48)

0.914

 PaCO2, mmHg

41.65(35.52–52.25)

38(34–44)

0.012

 PaO2, mmHg

85.25(77.3–101.5)

99(81–129)

0.008

 PaO2/FiO2, mmHg

259(212.46–314.25)

302(234–383)

0.003

Laboratory findings

 Leukocyte count, × 10.9/L

10.15(8.13–14.45)

8.9(6.7–12)

0.023

 Platelet count, × 10.9/L

154(112–234)

184(135–253)

0.031

 MPV, fl

11.6(10.48–12.88)

10.2(9.5–10.9)

0.000

 PDW, %

12(10.98–14.9)

12.1(10.5–13.6)

0.138

 Platelet large cell ratio, %

29.8(24.68–38.18)

28.2(21.6–33.5)

0.056

 CRP, mg/L

71(33–99)

44(16–86)

0.004

  1. Continuous variables were presented as median and interquartile range (IQR) or (mean ± standard deviation, SD). Difference of RR was compared by Student’s t test. Difference of other variables were compared by Mann–Whitney U-test
  2. Abbreviation: RR Respiratory Rate, HR Heart Rate, SBP Systolic Blood Pressure, SPO2 Peripheral Oxygen saturation, PaCO2 arterial Carbon dioxide tension, PaO2, arterial Oxygen tension, FiO2 Fraction of inspired Oxygen, MPV Mean Platelet Volume, PDW Platelet Distribution Width, CRP C-reactive Protein