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

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

	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

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.

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