Table 5

Height for age and weight for age centile values expressed as Z scores using NCHS standards

Age (years)		Boys				Girls
Age (years)		3rd	10th			50th	90th	97th	3rd	10th	50th	90th	97th
Height for age
0	−2.5	–1.7	−0.2	1.1	1.6		−2.2	−1.4	0.0	1.2	1.8
3	−2.3	−1.8	−0.6	0.5	1.0		−2.2	−1.6	−0.4	0.8	1.3
6	−2.7	−2.1	−0.9	0.3	0.8		−2.4	−1.8	−0.5	0.7	1.3
9	−2.8	−2.2	−0.9	0.3	0.9		−2.3	−1.7	−0.7	0.4	1.0
12	−2.9	−2.4	−1.3	−0.1	0.4		−3.3	−2.7	−1.4	0.0	0.6
15	−3.7	−3.0	−1.7	−0.4	0.2		−2.5	−1.9	−0.5	0.9	1.6
18	−4.1	−3.1	−1.2	0.6	1.4		−1.9	−1.2	0.2	1.7	2.4

Weight for age
0	−2.7	−1.9	−0.2	1.1	1.7		−2.1	−1.4	−0.1	1.6	2.5
3	−2.5	−2.1	−1.0	0.1	0.5		−2.9	−2.3	−1.0	0.2	0.6
6	−2.8	−2.3	−1.3	−0.1	0.3		−2.4	−2.0	−1.0	0.1	0.5
9	−2.6	−2.2	−1.3	−0.3	0.2		−2.2	−2.0	−1.3	−0.4	0.0
12	−2.7	−2.4	−1.7	−0.7	−0.2		−2.5	−2.3	−1.7	−0.8	−0.2
15	−3.5	−3.2	−2.2	−0.9	−0.1		−2.9	−2.5	−1.4	−0.3	0.2
18	−4.3	−3.5	−2.0	−0.9	−0.4		−2.4	−1.9	−0.8	0.1	0.4

NCHS, National Center for Health Statistics.