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Stratified analysis of the difference between K+ measured by AA and ABG
| Group mmol/l | No. of values | Mean difference mmol/l | SD difference mmol/l | Max. difference mmo/l | Min. difference mmol/l |
|---|---|---|---|---|---|
| >5.0 | 58 | 0.44 | 0.05 | 1.8 | 0.0 |
| 3.5–5.0 | 106 | 0.46 | 0.03 | 1.6 | 0.0 |
| <3.5 | 36 | 0.42 | 0.02 | 2.4 | 0.0 |
