Perinatal transmission in infants of mothers with chronic hepatitis B in California

Table 1 Univariate analysis of infant characteristics among those with maternal hepatitis B virus DNA results n (%)

Infant characteristics	Cases (n = 27)	Controls (n = 135)	OR	P value
Sex
Male	17 (63.0)	73 (54.1)	Reference
Female	10 (37.0)	62 (45.9)	0.693 (0.296-1.623)	0.398
Birthweight1
> 2500 g	25 (92.6)	121 (89.6)	Reference
< 2500 g	2 (7.4)	14 (10.4)	0.692 (0.148-3.235)	0.640
Gestational age2
Full term	25 (92.6)	116 (85.9)	Reference
Preterm	2 (7.4)	17 (12.6)	0.546 (0.118-2.515)	0.437
Unknown	0 (0)	2 (1.5)	-	-
Errors with HBIG or Birth Dose
None	26 (96.3)	132 (97.8)	Reference
Any	1 (3.7)	3 (2.2)	1.692 (0.169-16.912)	0.654
Late or incomplete series
No	24 (88.9)	117 (86.7)	Reference
Yes	3 (11.1)	18 (13.3)	0.813 (0.222-2.978)	0.754

¹Birthweight defined by different Advisory Committee on Immunization Practices recommendations for vaccination at this weight threshold;

²Full term defined as ≥ 37 wk and preterm defined as < 37 wk gestation. HBIG: Hepatitis B immunoglobulin.