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. 2019 Jul 1;7(13):e14149. doi: 10.14814/phy2.14149

Figure 1.

Figure 1

Relationships between the z‐scores of lung diffusing capacity for nitric oxide (DLNO) (y‐axis) and standard (9–11 sec breath‐hold time) lung diffusing capacity for carbon monoxide (DLCO) (x‐axis) in healthy controls (asterisks) and SSc subjects. Symbols indicate subjects with spirometry and total lung capacity (TLC) > LLN5 (white), DLCO < LLN5 (light grey), and TLC < LLN5 (dark grey). Triangles indicate subjects with systolic pulmonary artery pressure (sPap) > 36 mmHg. The dashed lines indicate the LLN5 (z‐score < −1.645). The absolute values indicate the number of the total 96 test results for DLNO that fall into each quadrant (Q1–Q4).