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ORBIT Score

ORBIT Score: calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.

ℹ Reference calculation based on the published method. It does not replace a clinical examination or a doctor's decision.

ORBIT Score

Age ≥75 years (1 = yes)
Low Hb/Hct or history of anemia (1 = yes)
Prior bleeding (1 = yes)
eGFR <60 mL/min/1.73 m² (1 = yes)
Antiplatelet therapy (1 = yes)
ORBIT total score
1
Hb <130 g/L (men) or <120 g/L (women); Hct <40% (men) or <36% (women)ORBIT Score: calculated with the published clinical method, with result interpretation. A reference tool that does not replace a doctor's advice.
Bleeding risk
Low
Bleeds per 100 patient-years
2.4

More about: ORBIT Score

What it calculates

The “ORBIT Score” calculator computes ORBIT total score from 5 parameters: age ≥75 years (1 = yes), low hb/hct or history of anemia (1 = yes), prior bleeding (1 = yes), egfr <60 ml/min/1.73 m² (1 = yes), antiplatelet therapy (1 = yes).

Used by professionals and patients to assess health metrics, dosages, and risks.

Example calculation

With parameters Age ≥75 years (1 = yes) = 1, Low Hb/Hct or history of anemia (1 = yes) = 0, Prior bleeding (1 = yes) = 0, eGFR <60 mL/min/1.73 m² (1 = yes) = 0, Antiplatelet therapy (1 = yes) = 0 the result is 1 (Hb <130 g/L (men) or <120 g/L (women); Hct <40% (men) or <36% (women)).

How to use

  1. Enter age ≥75 years (1 = yes), low hb/hct or history of anemia (1 = yes), prior bleeding (1 = yes), egfr <60 ml/min/1.73 m² (1 = yes) and antiplatelet therapy (1 = yes) — each field above is adjustable with a slider.
  2. ORBIT total score is calculated automatically as you type.
  3. Check the worked example below to see the formula applied to real numbers.
  4. Copy the result or bookmark this calculator.

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FAQ

How is BMI calculated?
BMI = weight (kg) / height (m)². Example: 70 kg / (1.75 m)² = 22.9. The WHO normal range is 18.5–24.9; below that is underweight, 25–29.9 is overweight, and 30+ is obese.
Is BMI accurate for everyone?
No. BMI does not distinguish muscle from fat, so athletes may show a high BMI with low body fat. It is also less reliable for teenagers, pregnant people, older adults, and very tall or short individuals.
What are the BMI categories?
Underweight: below 18.5. Normal: 18.5–24.9. Overweight: 25–29.9. Obese class I: 30–34.9; class II: 35–39.9; class III: 40+.
What is a better measure than BMI?
Body fat percentage, waist-to-height ratio (aim for under 0.5), and waist circumference give a clearer picture of health than BMI alone.

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