TABLE 3.

Pearson’s correlation coefficients between ULC, ULR, ULG, arm span, and recumbent length and height of infants and children by age, sex, and ethnicity¹

	n	ULC	ULR	ULG	Arm span
Recumbent length	941	0.90*	0.85*	0.86*	0.98*
Age (mo)
0–11.9	567	0.81*	0.75*	0.65*	0.95*
12–23.9	272	0.77*	0.68*	0.77*	0.95*
24–35.9	102	0.74*	0.71*	0.73*	0.86*
Sex
Boys	497	0.89*	0.87*	0.85*	0.98*
Girls	444	0.91*	0.84*	0.87*	0.99*
Ethnicity
NHW	172	0.91*	0.88*	0.86*	0.99*
Hispanic	458	0.87*	0.90*	0.83*	0.98*
NHB	242	0.94*	0.74*	0.89*	0.98*
Other	66	0.97*	0.94*	0.91*	0.99*
Height	578	0.87*	0.82*	0.87*	0.96*
Age (mo)
24–35.9	166	0.75*	0.57*	0.73*	0.92*
36–71.9	412	0.82*	0.75*	0.82*	0.94*
Sex
Boys	286	0.87*	0.79*	0.87*	0.96*
Girls	292	0.87*	0.85*	0.87*	0.96*
Ethnicity
NHW	142	0.90*	0.83*	0.88*	0.96*
Hispanic	194	0.82*	0.77*	0.86*	0.97*
NHB	165	0.91*	0.86*	0.88*	0.97*
Other	77	0.88*	0.89*	0.86*	0.94*

¹Length was measured in children aged ≤3 y. Height was measured in children aged 2–5.9 y. *P < 0.001. NHB, nonHispanic black; NHW, nonHispanic white; ULC, ulnar length by caliper; ULG, ulnar length by grid; ULR, ulnar length by ruler.