Table 21.

Categories of risk used for health economic comparisons [166]

Disease	Risk category
	I	II	III	IV
Osteoporosis	BMD T-score = −2.5 SD	BMD T-score = −3.0 SD	BMD T-score = −2.5 SD and prior vertebral fracture	BMD T-score = −3.0 SD and prior vertebral fracture
Hypertension	SBP = 140	SBP = 160	SBP = 140 and diabetes	SBP = 160 and diabetes + smoking
Hyperlipidaemia	TC 7.25 mmol/l	TC 7.25 mmol/l, HDL 1.3 mmol/l	TC 7.25 mmol/l, HDL 1.3 mmol/l and diabetes	TC 7.25 mmol/l, HDL 1.3 mmol/l, diabetes and smoking

SBP: systolic blood pressure (mm Hg); TC: total cholesterol (mmol/l); HDL: high density lipoprotein (mmol/l)