Table 3.

Characteristics of varicella notifications aged 3–5 years¹, Hong Kong, 2009, 2012, and 2015.

		2009 (n = 2088)		2012 (n = 2539)		2015 (n = 2379)		Total (n = 7006)
Characteristics		N	%	N	%	N	%	N	%
Female gender		923	44.2	1156	45.5	1063	44.7	3142	44.8
Age (years)	3	653	31.3	727	28.6	675	28.4	2055	29.3
	4	751	36.0	951	37.5	866	36.4	2568	36.7
	5	684	32.8	861	33.9	838	35.2	2383	34.0
Clinical condition	Immunosuppression	0	0.0	1	0.0	1	0.0	2	0.0
	Complications	3	0.1	13	0.5	13	0.5	29	0.4
	Hospitalization	19	0.9	26	1.0	30	1.3	75	1.1
Varicella vaccination		346	16.6	485	19.1	470	19.8	1301	18.6
No. of dose received2	1	NA	NA	398	82.1	368	78.3	766	58.9
	2	NA	NA	16	3.3	46	9.8	62	4.8
	Unknown	346	100.0	71	14.6	56	11.9	473	36.4
Age of last vaccination (year)2	<1	1	0.3	2	0.4	2	0.4	5	0.4
	1	122	35.3	215	44.3	234	49.8	571	43.9
	2	142	41.0	142	29.3	123	26.2	407	31.3
	3	40	11.6	55	11.3	37	7.9	132	10.1
	4	16	4.6	15	3.1	10	2.1	41	3.2
	5	2	0.6	2	0.4	7	1.5	11	0.8
	Unknown	23	6.6	54	11.1	57	12.1	134	10.3

Note:

¹Two hundred and ninety-six cases were excluded from the analyses and thus not included in the above table (imported: 33, residential care homes: 4, did not attend preschool: 259).

²Among those vaccinated with varicella vaccines.