Figure 2
From: Clinical patterns in asthma based on proximal and distal airway nitric oxide categories
Exhaled nitric oxide (eNO) categories. Scatter plot between maximum proximal airway nitric oxide flux (J'awNO) and distal airway/alveolar nitric oxide concentration (CANO). When axial diffusion is considered, there is no correlation (Spearman rank, r = -0.002) between J'awNO and CANO. Asthmatic eNO categories based on thresholds for non-asthmatics J'awNO(≤ 1.5 nl/s) and CANO (≤ 2.3 ppb): Type I (white triangle), normal J'awNO and normal CANO; Type II (white diamond), elevated J'awNO and normal CANO; Type III (white circle), elevated J'awNO and elevated CANO; and Type IV (white square), normal J'awNO and elevated CANO.