TABLE 2.

Comparison of z-scores using Rosenthal and Global Lung Function Initiative (GLI) reference sets

	Rosenthal z-score	GLI z-score	Mean difference Rosenthal−GLI	95% LOA
TLCO	−1.33±1.3	−1.06±1.2	−0.27 (−0.3–−0.2)	−1.4–0.9
KCO	−1.98±1.1	−0.31±1.0	−1.67 (−1.7–−1.6)	−2.3–−1.0
VA	0.39±1.6	−0.99±1.4	1.38 (1.3–1.5)	0.1–2.7

Data are presented as mean±sd or mean difference (95% CI), unless otherwise stated. LOA: limits of agreement; T_LCO: transfer factor of the lung for carbon monoxide; K_CO: transfer coefficient of the lung for carbon monoxide; V_A: alveolar volume.