Urinary excretion of phosphate in normal children.

Thalassinos, N. C., Leese, B., Latham, S. C., and Joplin, G. F. (1970). Archives of Disease in Childhood, 45, 269. Urinary excretion of phosphate in normal children. In 55 normal children on a normal diet, the phosphate and creatnine were estimated in a fasting 2-hour urine collection and in a simultaneous blood sample. In comparison with adults, a high serum phosphate and relatively decreased phosphaturia were found, both of which tended to adult values with the advent of puberty. A correlation between the serum phosphate and the urine phosphate/creatinine ratio (r = + 0-42, p <0 -002) was found. The phosphate excretion index was lower in mid-childhood than in adulthood. The interpretation of any expression of phosphaturia in childhood requires its own age-specific normal range.