A Combined Ultrasonic Backscatter Parameter for Bone Status Evaluation in Neonates

Table 4

Correlation coefficients of backscatter parameters with anthropometric indices and biochemical markers.

	AIB			SCS			CAS
	3.5 MHz	5.0 MHz	7.5 MHz	3.5 MHz	5.0 MHz	7.5 MHz	3.5 MHz	5.0 MHz	7.5 MHz
Birth weight
Spearman r	0.60	0.47	0.39	–0.54	–0.56	–0.51	0.69	0.65	0.62
P value	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
Length
Spearman r	0.53	0.42	0.36	–0.52	–0.51	–0.45	0.63	0.59	0.56
P value	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
Head circumference
Spearman r	0.57	0.44	0.39	–0.54	–0.53	–0.50	0.67	0.62	0.60
P value	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
Alkaline phosphatase
Spearman r	–0.23	–0.20	–0.20	0.18	0.21	0.18	–0.25	–0.26	–0.26
P value	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
Calcium
Spearman r	0.31	0.28	0.17	–0.24	–0.28	–0.30	0.33	0.34	0.32
P value	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001	< 0.001
Phosphorus
Spearman r	–0.11	–0.09	–0.14	0.09	0.13	0.06	–0.12	–0.14	–0.14
P value	0.017	0.056	0.002	0.054	0.004	0.217	0.008	0.001	0.002