PFTs for 4 different patients. There are 4 reports of PFTs for 4 different patients. Each report contains 5 columns of information in the following order: type/name of the test, unit of the test, reference “predicted” value for each test, prebronchodilator-measured value for each test, and prebronchodilator percentage (measured divided by predicted values) for each test. Postbronchodilator values and percentages were not shown here, as they do not contribute to the coding of pulmonary comorbidity per the HCT-CI. All uncorrected values or percentages of measured DLco were corrected for the concurrent hemoglobin values, using the Dinakara equation [corrected DLco = uncorrected DLco/(0.06965 × hemoglobin g/dL)]. (A) This is a patient who had an FEV1 percentage of 97%. The patient also had an uncorrected DLco percentage of 63%. The patient’s concurrent hemoglobin value was 11.1 mg/dL; hence, he had a corrected DLco percentage of 81%. This patient was assigned a score of 0 for pulmonary comorbidity. (B) This patient had an FEV1 percentage of 77% and also experienced an uncorrected DLco percentage of 60%. Because the concurrent hemoglobin value was 11.0 mg/dL, the corrected percentage of DLco is 78%. This patient was assigned a score of 2 for pulmonary comorbidity because of both the FEV percentage of 77% and the corrected DLco percentage of 78%. (C) This is a patient with an FEV1 percentage of 71%. The uncorrected DLco percentage was 41%. The concurrent hemoglobin value was 11.5 mg/dL; therefore, the patient has a corrected DLco percentage of 52%. This patient was assigned a score of 3 for pulmonary comorbidity because of the corrected DLco percentage of 52%. (D) This patient experienced an FEV1 percentage of 47%. The uncorrected DLco percentage was 40%. The concurrent hemoglobin value was 10.4 mg/dL; therefore, the corrected DLco percentage was 56%. This patient was assigned a score of 3 for pulmonary comorbidity because of both the FEV percentage of 47% and the corrected DLco percentage of 56%.