Table 1.

Average measurement differences by sex and age group for accuracy measurement pilot

Groups (n)	Measurement board (m) X ± 1 SD	AMA laser (m) X ± 1 SD	Mean difference (m)
Total (62)	0.978 ± 0.225	0.975 ± 0.221	0.003 ± 0.004
Girls (31)	0.997 ± 0.210	0.993 ± 0.207	0.004 ± 0.003
Boys (31)	0.959 ± 0.245	0.957 ± 0.236	0.002 ± 0.009
2–8-year-olds (height) (45)	1.101 ± 0.096	1.096 ± 0.091	0.005 ± 0.005
<2-year-olds (length) (17)	0.651 ± 0.123	0.656 ± 0.120	−0.005 ± 0.003