Table 3.

L, M, and S parameters and percentiles for body mass index for age: boys 5 to 18 years.

Age (y)	L	M	S	3rd	5th	10th	25th	50th	75th	85th	90th	95th	97th
5	−1.1546	14.425	0.11715	11.85398	12.12153	12.56001	13.37456	14.42514	15.67127	16.44123	17.01084	17.93816	18.60128
6	−1.1749	14.535	0.12861	11.74748	12.03238	12.50179	13.38225	14.53462	15.92714	16.80206	17.45674	18.53642	19.31935
7	−1.1943	14.712	0.13997	11.70181	12.00415	12.50487	13.45289	14.71178	16.26175	17.25246	18.00262	19.25692	20.18026
8	−1.2098	15.083	0.15111	11.81397	12.13688	12.67425	13.70075	15.08292	16.81615	17.9431	18.80676	20.27145	21.36678
9	−1.2071	15.628	0.16196	12.0571	12.40471	12.98559	14.10385	15.62799	17.57034	18.85257	19.84589	21.55233	22.84696
10	−1.1782	16.265	0.17227	12.36124	12.7369	13.36675	14.5866	16.26476	18.42953	19.87483	21.00345	22.96081	24.46162
11	−1.1235	16.946	0.18163	12.69091	13.09729	13.78019	15.10806	16.94554	19.33282	20.93661	22.1942	24.38563	26.07443
12	−1.0488	17.642	0.18983	13.0272	13.46638	14.20533	15.64509	17.6423	20.2427	21.9916	23.36342	25.75361	27.59449
13	−0.9647	18.314	0.1968	13.3455	13.81801	14.61342	16.1639	18.31431	21.10948	22.98428	24.45111	26.99756	28.94971
14	−0.8892	18.98	0.20253	13.67167	14.1767	15.02697	16.68413	18.97991	21.95556	23.94398	25.49473	28.17519	30.21912
15	−0.8478	19.666	0.20714	14.04488	14.57897	15.47866	17.23341	19.66593	22.81892	24.92463	26.56565	29.39888	31.55593
16	−0.8615	20.334	0.21081	14.45751	15.01265	15.94931	17.78165	20.33412	23.66469	25.90323	27.65583	30.69856	33.02959
17	−0.9132	20.943	0.21387	14.86774	15.43648	16.39831	18.28857	20.94259	24.4459	26.82817	28.70968	32.01193	34.57371
18	−0.9786	21.486	0.21658	15.25003	15.82811	16.80817	18.74401	21.4863	25.15499	27.68465	29.704	33.29661	36.1284