TABLE 2.

Comparison between influenza types/subtypes as a cause of ARI, National Egyptian Surveillance, 2016‐2019

	Totala number	H1N1		H3N2		Flu‐B		P Value
		No	%	No	%	No	%
All cases	7120	2990	42.0	1773	24.9	2357	33.1	<.001
Age‐group years
<2	520	226	43.5	110	21.2	184	35.4	.115
2‐4	828	328	39.6	191	23.1	309	37.3	.023
5‐14	836	232	27.8	166	19.9	438	52.4	<.001
15‐49	2569	1130	44.0	621	24.2	818	31.8	.037
50‐64	1624	800	49.3	427	26.3	397	24.4	<.001
≥65	743	274	36.9	258	34.7	211	28.4	<.001
Gender
Males	3654	1532	41.9	923	25.3	1199	32.8	.746
Females	3466	1458	42.1	850	24.5	1158	33.4
Symptoms onset to hospitalization (mean ±SD)	4.8 ± 4.0	5.1 ± 5.0		4.7 ± 3.9		4.6 ± 3.5		<.001
Outcome
Died	353	245	69.4	58	16.0	50	14.2	<.001
Discharged	6767	2745	40.6	1715	25.3	2307	34.1
Year
2016	2727	1413	51.8	733	26.9	581	21.3	<.001
2017	777	44	5.7	117	15.1	616	79.3	<.001
2018	1886	703	37.3	728	38.6	455	24.1	<.001
2019	1730	830	48.0	195	11.3	705	40.8	<.001
Season
June‐August	399	35	8.8	105	26.3	259	64.9	<.001
September‐November	1763	451	25.6	832	47.2	480	27.2	<.001
December‐February	3330	1968	59.1	656	19.7	706	21.2	<.001
March‐May	1628	536	32.9	180	11.1	912	56.0	<.001
Region
Lower Egypt	4064	1542	37.9	1093	26.9	1429	35.2	<.001
Upper Egypt	1688	670	39.7	431	25.5	587	34.8	.082
Urban governorates	1092	600	54.9	216	19.8	276	25.3	<.001
Frontier governorates	276	178	64.5	33	12.0	65	23.6	<.001

^a Cases with co‐infections are not presented.