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Exact Dx synthetic data · demonstration

← How it decides

GFR and albuminuria categories, and the 3-month persistence rule

Low filtering rate (below 60) on two results at least 90 days apart; otherwise say what is missing.

Rule and version
kdigo_ckd_2024@1.1
Published source
Kidney Disease: Improving Global Outcomes (KDIGO) CKD Work Group. KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease. Kidney Int 2024;105(4S):S117-S314. Definition: abnormality of kidney structure or function present for more than 3 months; GFR categories G1-G5; albuminuria categories A1-A3. https://kdigo.org/guidelines/ckd-evaluation-and-management/
Edition
KDIGO 2024 CKD guideline (G/A categories, more than 3 months)
Effective
from 2026-11-12
Role
persistence phenotype and G/A category
Status
draft: encoded from the published source; not yet signed off by a clinical reviewer
Clinical reviewer
—
Coding reviewer
—
Sponsor
none
Body hash
1a5087a17cd1b339f06da694dd8fcb92fe2f13fdbce57b886716763289bd95ad

Thresholds and parameters

{
  "a_categories": [
    [
      "A3",
      300.0001
    ],
    [
      "A2",
      30
    ],
    [
      "A1",
      0
    ]
  ],
  "acr_threshold": 30,
  "acute_change": "latest creatinine >= 1.5x the lowest value in the previous 365 days: 'possible acute change; repeat needed'",
  "acute_change_lookback_days": 365,
  "acute_change_ratio": 1.5,
  "albuminuria_route": "eGFR >= 60 counts only with urine ACR >= 30 mg/g on two values >= 90 days apart and no ACR < 30 between them",
  "classify_on": "eGFR rounded to report_decimals (what the screen shows)",
  "egfr_threshold": 60,
  "g_categories": [
    [
      "G1",
      90
    ],
    [
      "G2",
      60
    ],
    [
      "G3a",
      45
    ],
    [
      "G3b",
      30
    ],
    [
      "G4",
      15
    ],
    [
      "G5",
      0
    ]
  ],
  "loinc_acr": "9318-7",
  "not_assessable": "anything else: no steady-state value, one value below 60, values below 60 spanning fewer than 90 days, or values on both sides of 60 without persistence; never reported as 'not met'",
  "not_met_requires": "two eGFR >= 60 at least 90 days apart with none < 60 between them, after the last value below 60",
  "persistence": "at least two eGFR < 60 whose collection dates are >= 90 days apart, with no eGFR >= 60 between them; the persistent category is the less severe of the two qualifying values' G ranges (the range both values meet); the latest value's range is reported separately and is 'not confirmed' when worse",
  "persistence_days": 90,
  "steady_state_exclusion": "LOCAL CONVENTION: creatinine values from an inpatient encounter in which the KDIGO creatinine-change criteria are met under any baseline are excluded from staging, because eGFR equations assume a steady state",
  "unstaged_or_g1_g2_statement": "with eGFR >= 60, a statement without a stage or at stage 1-2 needs kidney damage markers that this check does not read: not assessable, never 'not supported'"
}

Boundary tests: 9/9 pass