Limits of agreement for each method against capnography
| Mean difference | Standard deviation | Limits of agreement (breaths per minute) | |
|---|---|---|---|
| Transthoracic impedance | −0.81 | 2.56 | −5.93 to 4.31 |
| Observer counting | 0.24 | 1.86 | −3.49 to 3.96 |
| PEP | 0.04 | 1.39 | −2.73 to 2.81 |