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AG in different CKD groups (mEq/l); AGalb = Albumin corrected anion gap, AGph = Phosphate corrected anion gap, AGk = potassium corrected anion gap.
| CKD stage | AG (SD) n = 1045 | AGalb (SD) | AGph (SD) | AGk (SD) |
|---|---|---|---|---|
| 1 | 8.8 (1.57) | 7.8 (1.55) | 7.7 (1.48) | 12.8 (1.60) |
| 2 | 8.7 (1.78) | 7.7 (1.73) | 7.7 (1.61) | 12.7 (1.74) |
| 3a | 9.0 (2.00) | 8.0 (1.98) | 8.4 (1.99) | 13.1 (2.01) |
| 3b | 9.5 (1.93) | 8.5 (1.91) | 8.9 (1.88) | 13.7 (2.07) |
| 4 | 9.9 (2.09) | 8.7 (2.07) | 9.2 (1.87) | 14.3 (2.07) |
| 5 | 11.2 (2.22) | 9.7 (2.16) | 10.6 (2.06) | 15.8 (2.25) |
