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Correlation between 25(OH)D levels and ACT total score.
Notes: (A) Positive correlation between ACT total score and 25(OH)D levels in ACOS and asthma study groups. (B) Positive correlation between ACT total score and 25(OH)D levels in ACOS group.
Abbreviations: ACT, asthma control test; ACOS, asthma–COPD overlap syndrome; COPD, chronic obstructive pulmonary disease; 25(OH)D, 25-hydroxyvitamin D.
