PTH Interpretation in Context of Calcium

Interpret PTH in context of serum calcium: high Ca + high PTH = primary hyperparathyroidism; high Ca + low PTH = non-PTH-mediated hypercalcemia; low Ca + high PTH = secondary hyperparathyroidism; low Ca + low PTH = hypoparathyroidism.

Weight
Height
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 to Use

Enter the values for the scenario you are assessing. Interpret PTH in context of serum calcium: high Ca + high PTH = primary hyperparathyroidism; high Ca + low PTH = non-PTH-mediated hypercalcemia; low Ca + high PTH = secondary hyperparathyroidism; low Ca + low PTH = hypoparathyroidism. Use the pth interpretation result to inform your calculation.

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