A

(% bone loss/age <0.25) and (Non-smokers and non-diabetic)

B

(% bone loss/age 0.25 to 1.0) and (<10 Cs/D or HbA1c <7.0%)

C

(% bone loss/age >1.0) and (>10 Cs/D or

HbA1c ≥7.0%)

Grade modifiers

AR

19%

64%

17%

AS

18%

61%

21%

AF

12%

68%

20%