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Table 1 Baseline characteristics

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

Characteristics Weaning failure(n = 54) Weaning success(n = 207) P
Age, year (mean ± SD) 73.0 ± 10.9 70.7 ± 13.4 0.261
Male (n, %) 35(64.8) 115(55.6) 0.220
BMI, kg/m.2(mean ± SD) 24.8 ± 3.58 24.06 ± 4.73 0.260
APACHE II score on admission
(mean ± SD)
21.7 ± 7.0 18.5 ± 6.7 0.004
IMV duration prior to weaning, days
(median, 25th–75th percentiles)
6(3–12) 3(2–7) 0.000
Cause of mechanical ventilation, n (%)
 Exacerbation of chronic respiratory disorders 13(24.1) 39(18.8) 0.391
 Pneumonia 19(35.2) 58(28.0) 0.304
 Sepsis 8(14.8) 30(14.5) 0.952
 Postoperation 6(11.1) 61(29.5) 0.006
 Congestive heart failure 2(3.7) 5(2.4) 0.637
 Neurological disease 4(7.4) 10(4.8) 0.497
others 2(3.7) 4(1.9) 0.276
Comorbidity disease, n (%)
 Hypertension 26(48.1) 118(57) 0.244
 Diabetes Mellitus 17(31.5) 57(27.5) 0.567
 Chronic heart disorders 18(33.3) 65(31.4) 0.786
 Chronic respiratory disorders 13(24.1) 64(30.9) 0.326
 Malignancy 15(27.8) 46(22.2) 0.390
 Chronic kidney disease 7(13.0) 22(10.6) 0.627
 Cerebrovascular disease 8(14.8) 35(16.9) 0.172
 Immunosuppression 2(3.7) 2(1.0) 0.190
  1. Continuous variables were presented as median and interquartile range (IQR) or (mean ± standard deviation, SD). Categorical variables were presented as numbers
  2. (n) and percentages (%). Difference of sex, cause of mechanical ventilation, and comorbidity disease between the groups were compared by Chi square (χ2) test. Difference of age, BMI and APACHE II score were compared by Student’s t test. Difference of IMV duration prior to weaning were compared by Mann–Whitney U-test
  3. Other causes of mechanical ventilation included acute pulmonary embolism(n = 1) and gastrointestinal bleeding(n = 1) in weaning failure group; and cardiac rest(n = 1) and gastrointestinal bleeding(n = 1) and trauma(n = 1) and hepatic encephalopathy(n = 1) in weaning success group
  4. Abbreviation: BMI Body Mass Index, IMV Invasive Mechanical Ventilation, APACHE II Acute Physiology and Chronic Health Evaluation II