The CLC0, actually DLCO, is definitely, significantly reduced. The borderline
TLC and the definitely reduced RV and RV/
TLC ratio are suggestive of restrictive lung disease. You failed to list the result of the FEV1 which would be the most important measurement for evaluation of asthma or chronic obstructive pulmonary disease (COPD), although the low TLC value would be against the diagnosis of either of these 2 obstructive lung diseases.