Horizontal transmission of hepatitis B virus in children with chronic hepatitis B

Table 1 Distribution of cases according to age groups.

Age (yr)	n	%
6-23 mo	21	7
24 mo-5 yr	63	20.9
>5-10 yr	143	47.3
>10 yr	75	24.8
Total	302	100

Table 2 ALT values, HBeAg and HBV-DNA positivity of cases.

	ALT (U/L) (n = 302)			HBeAg (n = 298)1		HBV-DNA (n = 156)1
	<40	40-80	>80	Positive	Negative	Positive	Negative
n	135	89	78	205	93	125	31
%	44.7	29.5	25.8	68.8	31	80.4	19.6

¹Not all data available for these parameters.

Table 3 Some risk factors in the cases.

Risk factors	n	%
Only mother HBsAg positive	92	30.5
Both parents HBsAg positive	23	7.6
Only father HBsAg positive	47	15.5
Only other siblings HBsAg positive	33	10.9
Mother and/or father antiHBs positive	95	31.4
Chronic disease	26	8.6
Surgical intervention	29	9.6
Dental manipulaton	11	3.6
Blood transfusion	4	1.3
No risk factors identified	22	7.3