Ishii et al reported simple screening tools for sarcopenia in older Japanese adults. One model predicts the risk in males while a second predicts the risk in women. The authors are from multiple institutions in Japan.
Patient selection: male >= 65 years of age
Parameters:
(1) age in years
(2) grip strength in kg
(3) calf circumference in cm
|
Parameter |
Finding |
Points |
|
age in years |
65 |
0 |
|
|
66 |
1 |
|
|
68 |
2 |
|
|
70 |
3 |
|
|
72 |
4 |
|
|
74 |
5 |
|
|
76 |
6 |
|
|
78 |
7 |
|
|
80 |
8 |
|
|
82 |
9 |
|
|
84 |
10 |
|
|
>= 86 |
11 |
|
grip strength |
>= 50 kg |
0 |
|
|
47 |
9 |
|
|
44 |
18 |
|
|
41 |
27 |
|
|
38 |
36 |
|
|
35 |
45 |
|
|
32 |
54 |
|
|
29 |
63 |
|
|
26 |
72 |
|
|
23 |
81 |
|
|
20 |
90 |
|
|
< 20 |
99 |
|
calf circumference |
>= 42 cm |
0 |
|
|
40 |
9 |
|
|
38 |
18 |
|
|
36 |
27 |
|
|
34 |
36 |
|
|
32 |
45 |
|
|
30 |
54 |
|
|
28 |
63 |
|
|
26 |
72 |
|
|
< 26 |
81 |
total score =
= SUM(points for all of the paraemters)
Interpretation:
• minimum score: 0
• maximum score: 191
|
Total Score |
Probability of Sarcopenia |
|
< 70 |
< 1% |
|
70 |
1% |
|
80 |
2% |
|
90 |
5% |
|
95 |
8% |
|
100 |
13% |
|
105 |
19% |
|
110 |
28% |
|
115 |
38% |
|
120 |
51% |
|
125 |
64% |
|
130 |
74% |
|
135 |
83% |
|
140 |
89% |
|
145 |
93% |
Comparable Equation
score =
= (0.62 * ((age) - 64)) - (3.09 * ((grip strength) - 50)) - (4.64 * ((calf circumference) - 42))
value of X =
= (0.1 * (score)) - 11.9
probability of sarcopenia =
= 1 / (1 + EXP((-1) * X))
