Austin Lupus Nephritis Severity

Assess lupus nephritis activity and chronicity using the Austin modification of the NIH Activity Index and Chronicity Index for renal biopsy specimens in systemic lupus erythematosus.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Assess lupus nephritis activity and chronicity using the Austin modification of the NIH Activity Index and Chronicity Index for renal biopsy specimens in systemic lupus erythematosus

Each component has a specific meaning:

  • Austin modification of the NIH Activity Index — The austin modification of the nih activity index recorded for the scenario being assessed.
  • Chronicity Index — The chronicity index recorded for the scenario being assessed.

Note: Interpret the austin ln score result against the thresholds and context described above.

How to Use

Enter the Austin modification of the NIH Activity Index, Chronicity Index for the scenario you are assessing. Assess lupus nephritis activity and chronicity using the Austin modification of the NIH Activity Index and Chronicity Index for renal biopsy specimens in systemic lupus erythematosus. Use the austin ln score result to inform your calculation.

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Frequently Asked Questions