Clinical characteristics and genetic causes of unexplained pediatric liver disease

Table 2 Reference intervals of commonly used biochemical test items in clinical practice for Chinese children

Items	Age	Reference interval, U/L
		Male	Female
Alanine transaminase	28 days to < 1 year	8-71
	1 year to < 2 years	8-42
	2 years to < 13 years	7-30
	13 to 18 years	7-43	6-29
Aspartate aminotransferase	28 days to < 1 year	21-80
	1 year to < 2 years	22-59
	2 years to < 13 years	14-44
	13 to 18 years	12-37	10-31
Gamma-glutamyl transferase	28 days to < 6 months	9-150
	6 months to < 1 year	6-31
	1 year to < 13 years	5-19
	13 to 18 years	8-40	6-26