Table 1

Number, percentage and annual rate of emergency visits and hospital admissions of Hanoi children referred to the National Children Hospital in Vietnam, by gender and age group

Variable	Emergency visits (2012–2014)			Hospital admissions (2007–2014)
Variable	N	%	Rate per 1000*	N	%	Rate per 1000†
All	12 389	100	2.22	199 827	100	13.82
Gender
Female	4481	36.2	1.72	70 631	35.4	10.38
Male	7908	63.8	2.65	129 196	64.7	16.88
Age group
<1	2387	19.3	5.55	81 648	40.9	85.74
1–4	7765	62.7	5.47	88 061	44.1	23.42
5–9	1883	15.2	1.13	23 470	11.8	6.28
10–14	339	2.7	0.26	6184	3.1	1.69
15–17	15	0.1	0.02	464	0.2	0.20

*Annual mean rate of emergency visits (per 1000 children)=1000×annual mean number of cases (2012–2014)/number of children in the respective gender or age group, using the midyear 2013 Hanoi children population as denominator.
†Annual mean rate of hospital admissions (per 1000 children)=1000×annual mean number of hospital admissions (2007–2014)/number of the respective gender or age using the midyear 2010 Hanoi children population as denominator.