Practice Variation in Spontaneous Breathing Trial Performance and Reporting

Table 2

Distribution of PS and PEEP ranges and preferred setting combinations (PEEP/PS).

Range (cmH2O)	Site 1 ()	Site 2 ()	Site 3 ()	Site 4 ()	Site 5 ()	Site 6 ()	Site 7 ()	Site 8 ()
PS
0 to 4	0%	0%	0%	2%	7%	98%	39%	100%
5	93%	97%	100%	90%	1%	2%	52%	0%
6 to 10	5%	1%	0%	7%	92%	0%	9%	0%
>10	1%	2%	0%	0%	0%	0%	0%	0%
PEEP
0 to 4	0%	1%	0%	0%	94%	85%	9%	7%
5	94%	98%	98%	76%	2%	15%	70%	86%
6 to 10	6%	1%	2%	24%	3%	0%	22%	7%
>10	0%	0%	0%	0%	0%	0%	0%	0%
Preferred settings
PEEP/PS	5/5 (92%)	5/5 (96%)	5/5 (98%)	5/5 (69%)	0/6 (90%)	0/0 (85%)	5/5 (27%)	5/0 (86)%
(% incidence)				8/5 (21%)			5/0 (23%)

Values expressed as % proportion of spontaneous breathing trials (SBTs) unless otherwise specified, that is, % incidence of preferred settings. PEEP: positive end expiratory pressure; PS: pressure support. values represent the number of SBTs at each site with available data.