Calculating and evaluating risk
Calculating the fracture risk
The fracture risk of a patient is calculated by multiplying the weighting factor for each category together. Use the table below to look up the corresponding weighting factor for each risk factor.
For example (seen in the last column of the following table):
 a person in a hostel with a balance grade of 5 (weighting factor 4.52)
 and a history of a previous fracture (weighting factor 1.56)
 has a cognitive function score of 20 (weighting factor 1.41)
 takes 6 medications (weighting factor 1.00)
 has a body weight of 48 kg (weighting factor 2.14)
 and a lower leg length of 51cm (weighting factor 1.27).
The fracture risk for this person is calculated as follows:
4.52 x 1.56 x 1.41 x 1 x 2.14 x 1.27 = 27.02
Using the fracture risk evaluation table, this score puts the person in the highest fracture risk group (>20) with a 23.1% chance of sustaining another fracture.
Variable 
Weighting factor 
Example 


Home type + balance grade) 
Intermediate care facility + balance (1–4) 
6.31 

Intermediate care facility + balance (5) 
4.52 
4.52 

Nursing home + balance (2–5) 
4.41 


Nursing home + balance (1) 
1.00 


Previous fracture 
Yes 
1.56 
1.56 
No 
1.00 


Cognitive function (SMMSE) 
18–23 
1.41 
1.41 
0–17 or 24–30 
1.00 


not known 
1.00 


Number of medications 
7 and greater 
1.30 

0–6 
1.00 
1.00 

Body weight (kg) 
27–52 
2.14 
2.14 
53–64 
1.84 


65 and greater 
1.00 


Lower leg length (cm) 
50.5 and greater 
1.27 
1.27 
less than 50.5 
1.00 


Relative Risk 


27.02 
Evaluating the fracture risk
Groups 
Fracture rate 

1 to 4.999 
2.9 
5 to 7.999 
6.4 
8 to 10.999 
7.6 
11 to 14.999 
14.6 
15 to 19.999 
18.2 
20 and greater 
23.1 