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Bone Density Risk (OSTA Score) Calculator

Assess osteoporosis risk in postmenopausal women

Metric (kg, cm) US Units (lb, in)

👩 Age

⚖️ Weight kg

📏 Height cm

Your OSTA Score:

Recommendations

📚 About the OSTA Score

The Osteoporosis Self-assessment Tool for Asians (OSTA) is a simple, validated tool to assess osteoporosis risk in postmenopausal women. While originally developed for Asian populations, it has shown usefulness in other ethnic groups as well.

How the OSTA Score is calculated

The OSTA score is calculated using the formula:

OSTA Score = (Weight in kg - Age in years) × 0.2

The result is then rounded to the nearest whole number.

Risk Categories

• Low Risk (OSTA > -1): Unlikely to have osteoporosis
• Medium Risk (OSTA -1 to -4): Moderate chance of osteoporosis
• High Risk (OSTA < -4): High chance of osteoporosis

Examples

Example 1: Low Risk

Age: 60 years
Weight: 65 kg
Calculation: (65 - 60) × 0.2 = 1.0 → OSTA Score = 1
Interpretation: Low risk of osteoporosis

Example 2: Medium Risk

Age: 70 years
Weight: 58 kg
Calculation: (58 - 70) × 0.2 = -2.4 → OSTA Score = -2
Interpretation: Medium risk of osteoporosis

Example 3: High Risk

Age: 75 years
Weight: 45 kg
Calculation: (45 - 75) × 0.2 = -6.0 → OSTA Score = -6
Interpretation: High risk of osteoporosis

Important Notes

• This tool is specifically for postmenopausal women.
• The OSTA score is a screening tool, not a diagnostic test.
• Those with medium or high risk should consult a healthcare provider for possible bone density testing (DEXA scan).
• Other risk factors (family history, medications, etc.) should also be considered.