Table 2.

The characteristics of newborn babies.

	Total	Suspected	Control	PKU
No. of samples	633,997	256	207	49
Sex
M	326,508	126	104	22
F	307,489	130	103	27
Average age at blood collection	~3.6 days (2–30 days)
Birth weight	3.3	3.3	3.3	3.2
	(1.73–4.89)	(1.75–4.87)	(1.77–4.87)	(1.75–4.7)
Gestational age	~39.13 week (30–44 week)