Lung function and outcomes in emergency medical admissions

Area of Science:

• Pulmonary Medicine
• Critical Care Medicine
• Health Outcomes Research

Background:

• Acute medical admissions present a significant challenge for predicting patient outcomes.
• Lung function tests like Forced Expiratory Volume (FEV1) and Diffusion Capacity for Carbon Monoxide (DLCO) are standard clinical measures.

Purpose of the Study:

• To evaluate the predictive ability of pre-existing FEV1 and DLCO for 30-day mortality in unselected acute medical admissions.
• To determine if lung function parameters can serve as reliable indicators of short-term survival.

Main Methods:

• Analysis of 106,586 emergency medical admissions (2002-2017), including 8071 respiratory cases.
• Utilized logistic multiple variable regression models to assess FEV1 and DLCO as predictors of 30-day hospital mortality.

Main Results:

• A curvilinear relationship was observed between FEV1/DLCO values and 30-day mortality.
• Higher FEV1 (OR 0.85) and DLCO (OR 0.76) values were independently associated with increased survival.
• Predicted mortality ranged from 3.3% to 23.5%, with FEV1 and DLCO showing equivalent predictive performance.

Conclusions:

• Pre-admission FEV1 and DLCO values are significantly related to 30-day mortality outcomes.
• Both FEV1 and DLCO are valuable tools for assessing hospital outcomes in acute medical admissions.
• Previously proposed cut-off points for these measures may not be supported by current data.