[Retracted] Influencing Factors on the Use of Tetrahydrobiopterin in Patients with Phenylketonuria

Table 1

Urine pterin analysis results of all patients.

	Age (year)	Phe (μmol/L)	Neopterin (mmol/molCr)	Biopterin (mmol/monCr)	N/B	B%
PKU	1.23 ± 0.84	961 ± 341	3.63 ± 3.60	5.57 ± 6.01	1.05 ± 1.32	57.92 ± 17.61
PTPSD 1	1.41	360	4.35	0.0100	265.00	0.25
PTPSD 2	0.98	1200	0.019	0.0034	56.30	0.08
PTPSD 3	1.37	360	4.28	0.0101	428.00	0.21
PTPSD 4	2.03	900	1.003	0.0060	165.21	0.31
Reference value	2 months to 6 years	＜120	0.28–2.60	0.35–2.96	0.30–0.94	42.70–75.90