A Biologic Control Subject Performs DLCO Measurements on 20 Consecutive

Multiple Choice

A biologic control subject performs DLCO measurements on 20 consecutive days,and the following statistics are calculated: The coefficient of variation for the DLCO in this subject:

A) Is approximately 4.5%
B) Cannot be calculated until 30 measurements have been made
C) Suggests that the patient may have asthma
D) Indicates that the DLCO system displays excessive variability