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. Author manuscript; available in PMC: 2023 Jul 25.

Published in final edited form as: Respir Med. 2020 Feb 25;164:105900. doi: 10.1016/j.rmed.2020.105900

Figure 4: — Correlation between changes in 6MWD and VE/VCO₂ (A), PETCO₂ (B) and time at AT (C) for the NEG , LI and HI groups. 6MWD = 6-minute walk distance; VCO₂ = ventilatory quotient for carbon dioxide; PETCO₂ = end tidal carbon dioxide partial pressure; AT = anaerobic threshold.

Inline graphic — Correlation between changes in 6MWD and VE/VCO₂ (A), PETCO₂ (B) and time at AT (C) for the NEG , LI and HI groups. 6MWD = 6-minute walk distance; VCO₂ = ventilatory quotient for carbon dioxide; PETCO₂ = end tidal carbon dioxide partial pressure; AT = anaerobic threshold.