Table 1.

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

Age	Centres using PFAA					Centres not using PFAA
	0-6 m n = 4	7-12 m n = 6	1-10y n = 64	11-16y n = 37	> 16y n = 33	0-6 m n = 0	7-12 m n = 3	1-10y n = 21	11-16y n = 11	> 16y n = 7
Total protein (g/kg)
Median	2.2	1.9	1.6	1.2	1.0	None reported	1.0	1.0	1.0	1.0
Min	1.6	1.1	1.0	0.5	0.7		1.0	0.8	0.5	0.6
Max	3.0	3.0	2.3	1.9	1.5		1.2	1.5	1.8	1.0
Natural protein (g/kg)
Median	1.0	1.0	0.8	0.7	0.6	None reported	1.0	1.0	1.0	1.0
Min	0.5	0.5	0.4	0.3	0.4		1.0	0.8	0.5	0.6
Max	1.3	1.2	1.4	1.2	0.8		1.2	1.5	1.8	1.0
PFAA (g/kg)
Median	1.2	0.9	0.7	0.6	0.5		-
Min	0.3	0.2	0.3	0.2	0.2
Max	2.5	2.5	1.8	0.9	0.8
Amount of total protein from PFAA used (%)
Median	55	44	43	43	50			-
Min	19	14	19	20	25
Max	83	83	78	70	67

PFAA: propionic acidaemia precursor-free amino acid supplements.

n: number of patients.