The Centers for Disease Control (CDC) published data on the body dimensions of pediatric patients in 2000. This included data on the body mass index of boys aged from 2 to 20 years.
body mass index =
= (body weight in kilograms) / ((height in meters)^2)
Equations derived in JMP
predicted BMI in kg per square meter =
= (A * ((age in months)^3)) + (B * ((age in months)^2)) + (C * (age in months)) + D
NOTE: While the equations are more compact than the CDC tables, problems may arise with (a) rounding of coefficients and (b) ages > 150 months (when taken to higher powers). The tables should be validated prior to clinical use.
|
interval in months |
percentile |
A |
B |
C |
D |
|---|---|---|---|---|---|
|
24-48.5 |
3rd |
0 |
0.0003452 |
-0.052763 |
15.587548 |
|
|
5th |
0 |
0.0003249 |
-0.05244 |
15.810183 |
|
|
10th |
0 |
0.0003597 |
-0.056277 |
16.233135 |
|
|
25th |
0 |
0.0004292 |
-0.064604 |
17.042926 |
|
|
50th |
0 |
0.0006467 |
-0.085637 |
18.262221 |
|
|
75th |
0 |
0.00105 |
-0.121802 |
19.878231 |
|
|
90th |
0 |
0.0016777 |
-0.175898 |
21.864903 |
|
|
95th |
0 |
0.0022358 |
-0.222976 |
23.399558 |
|
|
97th |
0 |
0.0027181 |
-0.263238 |
24.608133 |
|
48.5-108.5 |
3rd |
0 |
0.0002823 |
-0.046202 |
15.419156 |
|
|
5th |
0 |
0.0003053 |
-0.049068 |
15.690611 |
|
|
10th |
0 |
0.0003597 |
-0.056334 |
16.232651 |
|
|
25th |
-0.000001 |
0.0006846 |
-0.083733 |
17.493863 |
|
|
50th |
-0.000002 |
0.0009583 |
-0.105723 |
18.71423 |
|
|
75th |
-0.000003 |
0.0013956 |
-0.135325 |
20.102279 |
|
|
90th |
-0.0000057 |
0.0020537 |
-0.174479 |
21.562601 |
|
|
95th |
-0.0000088 |
0.0028015 |
-0.219817 |
22.881517 |
|
|
97th |
-0.000012 |
0.0036516 |
-0.274253 |
24.280271 |
|
108.5-168.5 |
3rd |
0 |
0.0002415 |
-0.034476 |
14.621513 |
|
|
5th |
0 |
0.0002386 |
-0.031987 |
14.614647 |
|
|
10th |
0 |
0.000235 |
-0.028107 |
14.621351 |
|
|
25th |
0 |
0.0002156 |
-0.017241 |
14.425168 |
|
|
50th |
0 |
0.0001826 |
-0.000427 |
14.057231 |
|
|
75th |
0 |
0.0001062 |
0.0311005 |
12.970116 |
|
|
90th |
0 |
-0.000024 |
0.0800441 |
11.064767 |
|
|
95th |
0 |
-0.000176 |
0.1321325 |
8.8095722 |
|
|
97th |
0 |
-0.000348 |
0.1870866 |
6.2543759 |
|
168.5-240 |
3rd |
-0.00000224 |
0.0012661 |
-0.191664 |
22.717153 |
|
|
5th |
-0.00000241 |
0.0013627 |
-0.209836 |
24.12687 |
|
|
10th |
-0.00000228 |
0.0012758 |
-0.190108 |
23.157874 |
|
|
25th |
-0.00000198 |
0.0010945 |
-0.148541 |
21.008315 |
|
|
50th |
-0.000001632 |
0.0008915 |
-0.104077 |
19.186961 |
|
|
75th |
-0.00000028 |
0.0000811 |
0.060847 |
9.9861462 |
|
|
90th |
0.00000224 |
-0.001398 |
0.3503902 |
-6.229976 |
|
|
95th |
0.00000473 |
-0.002846 |
0.6263186 |
-21.38313 |
|
|
97th |
0.0000074 |
-0.004377 |
0.9160065 |
-37.56894 |
ICD-10: ,
