Table 1. Summary of key MCC measures.

ICC: Intraclass correlation. PCL: Periciliary liquid layer depth; MCT: Mucociliary transport rate; CBF: Ciliary beat frequency; ASL: Airway surface liquid layer depth; ET: Epithelium thickness; pCC: Percent cilia coverage.

Metric	non-CF		CF		P-value	Measure- ment success rate (%)	ICC for intra- observer reliability	ICC for inter- observer reliability
	mean	95% CI	mean	95% CI
PCL (μm)	6.9	6.1–7.6	5.6	5.2–6.0	<0.01	95	0.9866	0.8844
MCT (mm/min)	11.2	9.3–13.1	5.1	3.3–7.0	<0.0001	80	0.9994	0.9895
CBF (Hz)	14.4	13.7–15.2	11.7	9.4–13.9	<0.05	95	0.9752	0.9505
ASL (μm)	41.4	17.0–65.8	45.9	20.9–70.9	0.7537	70	0.9977	0.9982
ET (μm)	81.3	70.6–92.0	75.4	69.8–81.0	0.3127	100	0.9972	0.9927
pCC (%)	72.1	52.5–91.6	38.2	20.0–56.5	<0.05	100	0.9998	0.9985