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Table 3 Comparison according to the duration of mechanical ventilation

From: A simple functional marker to predict the need for prolonged mechanical ventilation in patients with Guillain-Barré syndrome

  MV ≤15 days
n= 12
MV >15 days
n= 28
P value
Sex, males/females 7/12 16/28 NS
Age, years 50 ± 20 56 ± 21 NS
SAPS II 35 ± 25 25 ± 15 NS
DSH, days 5.0 ± 6.3 6.2 ± 7.2 NS
Delay to improvement, days 12 ± 11 28 ± 30 0.03
ICU length of stay, days 17 ± 10 75 ± 99 0.002
Sodium at admission, mmol/L 136 ± 3.9 133 ± 3.5 0.04
Dysautonomy, number 8/12 16/28 NS
EMG subtype, percentage of demyelinating subtype 63 82 NS
Acquired infection, percentage of patients 75 96 NS
Lack of foot flexion, number (percentage)    
   At admission 4 (34) 18 (65) 0.01
   At the end of immunotherapy 5 (42) 23 (82) 0.001
Independent ambulation at follow-up, percentage 53 49 NS
Deaths, number 2 2 -
  1. Data are presented as mean ± standard deviation (median) unless otherwise stated. Delay to improvement refers to delay between end of immunotherapy and first neurological improvement. DSH, delay between onset of symptoms and hospital admission; EMG, electromyography; ICU, intensive care unit; MV, mechanical ventilation; NS, not significant; SAPS II, Simplified Acute Physiology Score II.