Bone Density T-Score Interpreter — Formel

Bone Density T-Score Classification

A T-score compares your bone density to a healthy 30-year-old adult.

WHO Categories

T-ScoreClassification Above -1.0Normal -1.0 to -2.5Osteopenia (low bone mass) Below -2.5Osteoporosis Below -2.5 with fractureSevere osteoporosis

Each decrease of 1 in T-score roughly doubles fracture risk.

Lösungsbeispiel

A 55-year-old with a T-score of -1.0.

  1. T-score = -1.0 (Osteopenia range starts at -1.0)
  2. Approximate 10-year risk = e^(0.5) x (55/50) x 3 = 1.65 x 1.1 x 3 = 5%
  3. Relative risk = 2^1 = 2.0x baseline