| 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% |