Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Absolute standardized differences for patient characteristics in the full cohort and propensity analysis. ARF = acute respiratory failure; COPD = chronic obstructive pulmonary disease; IMV = invasive mechanical ventilation; NIV = noninvasive ventilation; OSA = obstructive sleep apnea; PN = pneumonia; PR = pulmonary rehabilitation; PS = propensity score; SNF = skilled nursing facility.
