Intersession Variability in Single-Breath Diffusing Capacity of Carbon Monoxide
Feb 09, 2026

In this study, Dlco was shown to exhibits substantial intersession variability in clinical settings, exceeding commonly recognized levels. The choice of variability metric influenced how changes are interpreted, especially across different baseline Dlco values. The evidence-based thresholds and 3-tier classification system established in this study provide practical tools for distinguishing clinically significant Dlco changes from normal measurement variability.


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