Subjects with and without CO2 retention during the first and the second test.
| Test 1 | Test 2 | ||||
|---|---|---|---|---|---|
| CO2 retention − | CO2 retention + | ||||
| CO2 retention − | 11 | 3 | 14 | ||
| CO2retention + | 1 | 13 | 14 | ||
| Total | 12 | 16 | 28 | ||
There were 24 concordant pairs of a total of 28 pairs, resulting in an agreement of 85.7%.