Table 1: Biochemical Parameters used Diagnosis of Preterm Osteopenia.

Calcium

Normal, decreased or increased

Phosphorous

Normal or decreased

Alkaline Phosphatase

Normal or increased

Osteocalcin

Increased

PTH

Normal, increased

1,25(OH)2 vitamin D

Increased

Calcitonin

Normal

Fractional excretion of Ca

Increased

Tubular reabsorption of P

Increased

Urine deoxyprydolin

Collagen breakdown product, decreased

Pyridoxine in urine

Collagen breakdown product, decreased

PICP

Collagen breakdown product, decreased

ICTP

Collagen breakdown product, decreased

B-ALP

No superiority of total ALP, increased