Table 1.

Descriptive statistics comparing centres (using/not using LFAA) for dietary prescription of: total protein (g/kg), natural protein (g/kg), LFAA (g/kg) and % of protein provided by LFAA compared with total protein prescription.

	Centres using LFAA					Centres not using LFAA
	Age 0–6 m (n = 2)	Age 7–12 m (n = 2)	Age 1–10 y (n = 40)	Age 11–16 y (n = 16)	Age  > 16 y (n = 5)	Age 0–6 m (n = 3)	Age 7–12 m (n = 0)	Age 1–10 y (n = 31)	Age 11–16 y (n = 15)	Age  > 16 y (n = 19)
Total protein (g/kg)
Median	2.2	1.9	1.7	1.1	1.1	1.6	None reported	1.3	1.0	0.9
Min	1.7	1.8	0.9	1.0	1.0	1.4		1.0	0.2	0.5
Max	2.6	2.0	2.3	1.5	1.5	1.8		2.0	1.8	1.1
Natural protein (g/kg)
Median	1.1	0.4	1.0	0.7	0.7	1.6	None reported	1.3	1.0	0.9
Min	1.0	0.4	0.4	0.4	0.4	1.4		1.0	0.2	0.5
Max	1.1	0.5	1.9	1.0	0.8	1.8		2.0	1.8	1.1
LFAA (g/kg)
Median	1.1	1.5	0.7	0.5	0.6	0	None reported	0	0	0
Min	0.7	1.3	0.2	0.4	0.3	0		0	0	0
Max	1.5	1.7	1.2	0.6	0.8	0		0	0	0
% amount of total protein from LFAA
Median	50	77	44	42	48	0	None reported	0	0	0
Min	41	72	17	29	27	0		0	0	0
Max	58	82	75	60	64	0		0	0	0

LFAA: leucine free l-amino acids.

n: number of patients.