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Table 4 Comparison of length of stay, death, causes of death, and mechanical ventilation time between groups

From: Noninvasive mechanical ventilation may be useful in treating patients who fail weaning from invasive mechanical ventilation: a randomized clinical trial

  NPPV (n = 28) IMV (n = 37) P value
Length of stay in ICU, days 18.9 ± 11.3 20.8 ± 10.9 0.51
Length of stay in hospital, days 9.6 ± 12.7 15.0 ± 18.6 0.19
Total length of stay in hospital, days 34.5 ± 20.6 42.4 ± 24.5 0.17
Death in ICU, number (percentage) 8 (28.6%) 8 (21.6%) 0.57
Death in ward, number (percentage) 1 (3.6%) 2 (5.4%) 1.00
Mechanical ventilation time after randomization, days 7.5 ± 7.8 10.0 ± 9.1 0.25
Total mechanical ventilation time, days 14.9 ± 9.9 17.3 ± 10.5 0.35
  1. Values are mean ± standard deviation. P value indicates comparison between groups using chi-square test. ICU, intensive care unit; IMV, invasive mechanical ventilation; NPPV, noninvasive mechanical ventilation.