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Section 2 of 6 · Open sections

Required section · Section 2 of 6

Read filtration and albuminuria as two axes

KDIGO classification uses GFR category and albuminuria category as two independent axes, with cause considered separately. G1 is at least 90 and G5 is below 15 mL/min/1.73 m^2. A1 is below 30, A2 is 30-300, and A3 is above 300 mg/g ACR.

The grid displays two classifications: eGFR 52 is G3a and ACR 145 is A2. It does not display a risk gradient. This placement supports a pattern, not a diagnosis from one draw.

G1A1 and G2A1 alone may not meet the definition of CKD without another marker of kidney damage. CKD also requires three months of persistence or other chronicity evidence. Assign G and A categories before reading the combined cell.

Illustrative drawing — this picture was drawn rather than captured.

Grid classifying GFR categories G1–G5 against ACR categories A1–A3. The case is at G3a/A2; no risk-gradient label is shown.
Figure 1G and A classification grid with the case at G3a/A2; the grid displays classification, not a risk gradient.

Reusable integration sequence

  1. Assign G category

    Use reported adult eGFR.

  2. Assign A category

    Use ACR.

  3. Place the grid cell

    Read both axes together.

  4. Review urine evidence

    Use protein, blood, cells, and casts to localize or challenge the pattern.

Knowledge checks

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Knowledge check 1

How are eGFR 52 and ACR 145 classified?

Choose one option.

Knowledge check 2

What does one G3a/A2 result set establish?

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Section status

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