A Combined Ultrasonic Backscatter Parameter for Bone Status Evaluation in Neonates

Table 6

Multivariate analysis of gestational age, anthropometric indices, and biochemical markers for the measurement of CAS.

Variables	3.5 MHz		5.0 MHz		7.5 MHz
	Regression; coefficient	P value	Regression; coefficient	P value	Regression; coefficient	P value
Gestational age (d)	0.006	< 0.001	0.005	< 0.001	0.008	< 0.001
Birth weight (g)	0.00006	0.191	0.0001	0.100	–0.00001	0.813
Length (cm)	0.001	0.825	–0.002	0.751	–0.013	0.152
Head circumference (cm)	0.008	0.383	0.002	0.834	0.034	0.002
Alkaline phosphatase (IU/L)	–0.00004	0.855	0.000	0.407	0.000	0.159
Calcium (mmol/L)	0.075	0.227	0.122	0.040	0.168	0.037
Phosphorus (mmol/L)	0.049	0.157	0.016	0.628	0.065	0.147