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 girls 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 |
0.0002554 |
-0.043459 |
15.046505 |
|
|
5th |
0 |
0.0003072 |
-0.050336 |
15.430338 |
|
|
10th |
0 |
0.0004495 |
-0.064926 |
16.100291 |
|
|
25th |
0 |
0.0007017 |
-0.090449 |
17.296425 |
|
|
50th |
0 |
0.0009919 |
-0.117745 |
18.675882 |
|
|
75th |
0 |
0.001347 |
-0.147304 |
20.186829 |
|
|
90th |
0 |
0.0016903 |
-0.170913 |
21.565822 |
|
|
95th |
-0.000012 |
0.0033567 |
-0.237873 |
23.053542 |
|
|
97th |
-0.000009 |
0.0031845 |
-0.234064 |
23.463454 |
|
48.5-108.5 |
3rd |
0 |
0.0003299 |
-0.05284 |
15.328967 |
|
|
5th |
0 |
0.0003435 |
-0.05346 |
15.498015 |
|
|
10th |
0 |
0.0003807 |
-0.056563 |
15.852396 |
|
|
25th |
-0.000002 |
0.0009205 |
-0.096961 |
17.326433 |
|
|
50th |
-0.000003 |
0.001358 |
-0.12925 |
18.769251 |
|
|
75th |
-0.000005 |
0.00178 |
-0.156344 |
20.158497 |
|
|
90th |
-0.000006 |
0.0021813 |
-0.17553 |
21.33771 |
|
|
95th |
-0.000008 |
0.0026502 |
-0.198077 |
22.311034 |
|
|
97th |
-0.0000087 |
0.0028088 |
-0.196475 |
22.510403 |
|
108.5-192 |
3rd |
-0.00000205 |
0.0010543 |
-0.13975 |
18.849471 |
|
|
5th |
-0.00000195 |
0.0009888 |
-0.12609 |
18.264214 |
|
|
10th |
-0.00000185 |
0.0009169 |
-0.109759 |
17.647025 |
|
|
25th |
-0.000002 |
0.0009566 |
-0.103677 |
17.651701 |
|
|
50th |
-0.0000021 |
0.0009521 |
-0.08679 |
17.274842 |
|
|
75th |
-0.000002 |
0.000817 |
-0.044953 |
15.820555 |
|
|
90th |
-0.00000185 |
0.0006335 |
0.0084365 |
14.016164 |
|
|
95th |
-0.0000014 |
0.0004092 |
0.0618632 |
12.122349 |
|
|
97th |
-0.000001 |
0.000197 |
0.1071976 |
10.617447 |
|
192-240 |
3rd |
0 |
-0.000448 |
0.2121283 |
-8.147858 |
|
|
5th |
-0.00000435 |
0.0023597 |
-0.394186 |
35.856745 |
|
|
10th |
-0.00000343 |
0.0017822 |
-0.271466 |
27.791512 |
|
|
25th |
-0.00000244 |
0.0011766 |
-0.14814 |
20.652913 |
|
|
50th |
-0.00000064 |
0.0000772 |
0.0818467 |
6.3162886 |
|
|
75th |
0 |
-0.0002514 |
0.1406526 |
5.1193646 |
|
|
90th |
0 |
-0.000104 |
0.0888222 |
12.878459 |
|
|
95th |
0 |
0.0000416 |
0.0409091 |
19.47072 |
|
|
97th |
0 |
0.0002201 |
-0.017203 |
26.470355 |
ICD-10: ,
