Diagnostic category is based on the following table endorsed by Osteoporosis Canada. Adapted from the World Health Organization [World Health Organ Tech Rep Ser 1994; 843:1-129] and 2005 International Society for Clinical Densitometry Official Positions [J Clin Densitom 2006; 9(1):22-30].
|<50 Years||Below expected range for age||Z-score ≤ -2.0|
|Within expected range for age||Z-score > -2.0|
|Sever (established osteoporosis||T-score ≤ -2.5 with fragility fracture|
|≥ 50 years||Osteoporosis||Z-score ≤ -2.5|
|Low bone mass||T-score -1.0 to -2.5|
|Normal||Z-score ≤ -1.0|
Number of standard deviations above (+) or below (-) the mean peak density; Z-score: number of standard deviations above (+) or below (-) the mean density for an individual of that age and sex. Fracture Risk (10-year absolute): low (<10%), moderate (10% to 20%), or high (>20%).