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aSID, eSID, and SIG in different CKD stages (mEq/l).
| CKD stage | aSID (SD) | eSID (SD) | SIG (SD) |
|---|---|---|---|
| 1 | 42.5 (2.75) | 41.3 (2.79) | 1.27 (1.52) |
| 2 | 42.8 (2.71) | 41.3 (2.71) | 1.50 (1.45) |
| 3a | 42.7 (3.09) | 40.5 (3.26) | 2.13 (1.60) |
| 3b | 42.0 (3.45) | 39.4 (3.46) | 2.60 (1.66) |
| 4 | 41.7 (3.99) | 38.5 (3.69) | 3.19 (1.78) |
| 5 | 40.4 (3.40) | 35.9 (3.48) | 4.45 (1.67) |
