Table 1.

Comparison of prevalence and clinical outcomes between types of study sites

	All sites (n=25)	Type 1 sites* (n=14)	Type 2 sites† (n=11)
No of screened newborns	21 272	14 642	6630
No of congenitally infected cases	66	35	31
Prevalence of congenital infection, % (95% CI)	0.31 (0.24 to 0.40)	0.24 (0.16 to 0.32)	0.47 (0.30 to 0.63)
Abnormalities identified within 3 months after birth
A: typical clinical manifestations at birth	22.7% (n=15)	8.6% (n=3)	38.7% (n=12)
B: abnormalities in brain images (CT/MRI)	15.2% (n=10)	11.4% (n=4)	19.4% (n=6)
A and/or B	30.3% (n=20)	17.1% (n=6)	45.2% (n=14)
Treated with antiviral drugs	9.1% (n=6)	0.0%	22.6% (n=6)
Detectable cytomegalovirus-IgM in blood of the cases	50.8% (30/59)	51.6% (16/31)	50% (14/28)

^*Primary obstetric clinics and municipal hospitals.

^†University-associated and governmental hospitals that care for general populations as well as patients referred from type 1 clinics.