What is T score?

Bone mass, BMD, accounts for 70% of bone strength, used to assess osteopororsis. Defined as BMDT <-2.5 below the mean peak BMD in young healthy adults of same gender. Limitations of T score (use of dual energy X ray which is 2D not 3D, not qualitative measures of bone strength not all bone components, fracures may occure with T score higher than -2.5) Osteopenia between -1 and -2.5