Table 1

LMS values for body mass index (kg/m²) in Dutch 0–21 years olds in 1997, by age and sex

Age		Boys (n = 7417)				Girls (n = 6960)
Age		L	M			S	L	M	S
Months
1.0	−0.62	14.42	0.086		−0.09	14.01	0.087
3.0	−0.38	16.13	0.081		−0.29	15.75	0.083
6.0	−0.22	17.15	0.078		−0.35	16.70	0.082
9.0	−0.15	17.44	0.077		−0.38	16.91	0.081
12.0	−0.12	17.35	0.076		−0.43	16.82	0.080
15.0	−0.09	17.12	0.077		−0.50	16.59	0.080
18.0	−0.06	16.87	0.077		−0.60	16.37	0.079
21.0	−0.03	16.62	0.078		−0.70	16.21	0.079
Years
2.0	−0.01	16.42	0.079		−0.82	16.07	0.078
3.0	−0.07	15.89	0.084		−1.18	15.74	0.081
4.0	−0.38	15.61	0.088		−1.42	15.51	0.087
5.0	−0.85	15.52	0.093		−1.57	15.37	0.094
6.0	−1.32	15.52	0.097		−1.66	15.47	0.102
7.0	−1.70	15.61	0.101		−1.71	15.71	0.110
8.0	−1.95	15.82	0.104		−1.73	16.00	0.117
9.0	−2.08	16.10	0.107		−1.72	16.32	0.122
10.0	−2.13	16.43	0.110		−1.69	16.72	0.126
11.0	−2.10	16.83	0.112		−1.66	17.21	0.128
12.0	−2.02	17.32	0.113		−1.63	17.82	0.128
13.0	−1.93	17.90	0.114		−1.63	18.51	0.127
14.0	−1.82	18.54	0.115		−1.64	19.19	0.126
15.0	−1.71	19.21	0.115		−1.68	19.81	0.123
16.0	−1.59	19.85	0.115		−1.73	20.34	0.121
17.0	−1.47	20.43	0.115		−1.78	20.78	0.119
18.0	−1.33	20.94	0.115		−1.83	21.16	0.117
19.0	−1.18	21.37	0.115		−1.88	21.50	0.115
20.0	−1.04	21.75	0.115		−1.93	21.80	0.113
21.0	−0.90	22.11	0.115		−1.97	22.09	0.111

M, median; S, coefficient of variation; L, the Box-Cox power transform required to remove the distribution's skewness.