Table 4.

Adjusted Geometric Mean Length of Stay Stratified by Unit

Unit	Coeflicient (SE)	Length of Stay, d, Geometric Mean (95% CI)a	P Value
Academic B (n = 162)
Invasive device percentage
None	−0.378 (0.125)		.002
>0 to 35	−0.068 (0.118)
>35 to 60	0.118 (0.126)
>60	1 [Reference]
Suctioning lapses
0	−0.474 (0.179)		.002
1	−0.316 (0.144)
2	−0.033 (0.148)
3 or 4	1 [Reference]
Academic A (n = 326)
Invasive device percentage
None	−0.221 (0.092)		.004
>0 to 35	−0.255 (0.079)
>35 to 60	−0.236 (0.080)
>60	1 [Reference]
Suctioning lapses
0	−0.421 (0.129)		<.001
1	−0.397 (0.111)
2	−0.186 (0.112)
3 or 4	1 [Reference]
Satellite (n = 115)
Invasive device percentage
None	−0.153 (0.105)		.15
Any	1 [Reference]
Suctioning lapses
0	−0.347 (0.127)		.03
1	−0.172 (0.121)
2, 3, or 4	1 [Reference]
Other academic (n = 92)
Invasive device percentage
None	−0.363 (0.181)		.10
>0 to 35	−0.405 (0.184)
>35 to 60	−0.129 (0.186)
>60	1 [Reference]
Suctioning lapses
0	−0.353 (0.192)		.19
1	−0.144 (0.163)
2, 3, or 4	1 [Reference]

^aExponential of the estimated marginal means (least squares means).

All models include the same covariates listed in Table 3.