Table 4

Width of approximate 95% confidence intervals for smoothed height (cm) and weight (kg) centiles

Age (years)		Boys				Girls
Age (years)		3rd	10th			50th	90th	97th	3rd	10th	50th	90th	97th
Height for age
0	1.5	1.2	0.8	1.2	1.5		1.9	1.3	0.7	1.3	1.4
3	0.9	1.0	1.1	1.1	1.0		1.1	1.1	1.1	1.2	1.3
6	1.1	1.1	1.2	1.5	1.7		1.4	1.1	1.1	1.4	1.7
9	1.4	1.3	1.2	1.4	1.9		1.7	1.3	1.0	1.5	1.9
12	1.7	1.5	1.4	1.7	1.9		2.4	2.0	1.4	1.5	2.1
15	3.2	2.3	1.8	1.7	2.3		2.6	2.3	2.0	2.2	2.6
18	4.3	2.8	2.7	4.0	5.5		2.6	2.3	2.0	2.6	3.3

Weight for age
0	0.3	0.2	0.2	0.2	0.3		0.2	0.2	0.2	0.3	0.3
3	0.3	0.3	0.4	0.4	0.4		0.4	0.4	0.5	0.5	0.5
6	0.4	0.4	0.4	0.7	0.9		0.5	0.4	0.4	0.7	0.9
9	0.6	0.6	0.7	1.0	1.5		0.7	0.6	0.5	1.0	1.5
12	0.9	0.8	0.7	1.4	1.9		0.9	0.8	0.7	1.4	3.6
15	2.4	1.8	1.2	2.6	4.9		2.5	1.9	1.7	2.5	3.8
18	5.9	4.1	2.2	3.3	4.7		3.9	2.6	1.8	2.5	3.8