Yazdani et al reported several equations related to bone mineral density in women. One equation predicts the T score for the spine. The authors are from Shaheed Beheshti University of Medical Sciences in Tehran.
Patient selection: adult women (minimum around 40)
Outcome: referral for bone mineral density testing
Parameters (based on those used for the hip T-score):
(1) age in years
(2) weight in kilograms
(3) menopause
(4) history of fracture (wrist, hip, vertebrae)
(5) oral contraceptive therapy
(6) regular exercise (> 30 minutes per day for >= 3 days per week)
Parameter
Finding
Points
age in years
(50-(age))) /5
weight
((weight)-50) /10
menopause
no
0
yes
-1
history of fracture
no
0
yes
-1.5
oral contraceptive
no
0
yes
1
regular exercise
no
0
yes
1.5
total score =
= SUM(points for all 6 parameters)
Score
Diagnosis
< -1
osteoporosis
-1 to 5
osteopenia
> 5
normal
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