Table 1.

General characteristics of ten intensive care units analyzed in the quality improvement project ^a

Unit ID	Type of ICU	ICU beds	ICU structure	Hospital beds	Major type of admission diagnosis	Use of invasive mechanical ventilation among admitted patients b
1	Mixed	19	Closed	119	General	15.1%
2	Cardiologic	19	Closed	119	Cardiologic	35.7%
3	Mixed	10	Closed	131	Respiratory	20.2%
4	Mixed	10	Closed	82	Respiratory	18.3%
5	Mixed	11	Closed	150	Respiratory	19.7%
6	Mixed/cardiologic	36	Closed	206	Respiratory	26.6%
7	Mixed	10	Closed	233	Respiratory	22.1%
8	Mixed	12	Closed	77	Respiratory	4.9%
9	Mixed	6	Closed	227	Orthopedic	20.0%
10	Neurologic	19	Closed	227	Neurologic	17.4%

^aICU, Intensive care unit. ^bMean rate during the 2-year period of the study.