. 2020 Jul-Aug;46(4):e20190005. doi: 10.36416/1806-3756/e20190005

Table 4. Comparison between ICUs with protocolized ventilator weaning and those without.

Criteria and other variables	Use of a weaning protocol
Criteria and other variables	Yes	No
Weaning and extubation readiness criteria, %
Clinical criteria	8.3^c	6.7^c
Clinical and biochemical criteria	59.6^a	83.3^a
Clinical criteria, biochemical criteria, and predictive indices, %	32.1^b	10.0^b
Clinical criteria and predictive indices	---	---
Time frame considered for extubation failure, %
24 h	34.5^a	14.7^c
48 h	42.9^a	52.5^a
72 h	14.3^b	3.3^c
Undefined	8.3^b	29.5^b
Frequency of extubation attempts, %
Patients successfully extubated on the first attempt	92.9^a	87.9^a
Patients required up to 3 extubation attempts	7.1^b	12.1^b
Use of a weaning protocol after extubation failure on the first attempt, %
Yes	46.4^a	3.3^b
No	47.6^a	88.5^a
In some cases	6.0^b	8.2^b
Time on MV recorded, %
Yes	94.0^a	96.7^a
No	6.0^b	3.3^b
Weaning time recorded, %
Yes	36.9^b	14.8^b
No	63.1^a	85.2^a
Causes of extubation failure recorded, %
Yes	71.4^a	45.9^a
No	28.6^b	54.1^a

MV: mechanical ventilation. Proportions followed by the same superscript lowercase letters in columns did not differ statistically from each other in the multiple comparison tests, p < 0.05 being considered significant.