Skip to main content
. Author manuscript; available in PMC: 2021 Oct 23.
Published in final edited form as: Ann Thorac Surg. 2020 Feb 28;110(4):1396–1403. doi: 10.1016/j.athoracsur.2020.01.033

Table 3.

Multivariable Analysis: Association of Hospital Survey Characteristics With 25% Shorter Than Expected Total Length of Stay

Characteristics RRR P Value

Annual ACU admissions (per 100) 1.01 [1.00–1.02] .092
Subspecialty presence (2–3 vs 0–1) 0.82 [0.73–0.93] .001
Subspecialty presence (4–6 vs 0–1) 0.79 [0.67–0.93] .006
ICU cross-trained nurses (yes vs no) 1.12 [0.98–1.27] .094
Intensity of therapy (4–6 points vs <4 points) 1.16 [1.01–1.32] .031
Intensity of therapy (>6 points vs <4 points) 1.28 [1.09–1.52] .003
Use of postoperative protocols (yes vs no) 1.03 [0.92–1.16] .566
Written ICU-to-ACU transfer process (yes vs no) 0.85 [0.77–0.94] .002
Discharge same day as chest tube or pacer wire removal (yes vs no) 0.88 [0.80–0.97] .010

Definitions for each variable are included in the Supplemental Material. ACU unit size, nurse-to-patient ratio, and multidisciplinary staff all dropped out of the model because of significant collinearity.

ACU, acute care unit; ICU, intensive care unit; RRR, relative risk ratio.