Table I.

Age group-wise distribution of cases and fatality rate of coronavirus disease 2019

Study	Country	Total number of cases	Age group (yr)	Number of cases (%)	Deaths (%)	Case-fatality rate (%)
The Novel	China	72,314	0-9	416 (0.9)	-	-
Coronavirus Pneumonia		(confirmed cases -
Emergency Response		44,672)	10-19	549 (1.2)	1 (0.1)	0.2
Epidemiology Team3			20-29	3619 (8.1)	7 (0.7)	0.2
			30-39	7600 (17.0)	18 (1.8)	0.2
			40-49	8571 (19.2)	38 (3.7)	0.4
			50-59	10,008 (22.4)	130 (12.7)	1.3
			60-69	8583 (19.2)	312 (30.5)	3.6
			70-79	3918 (8.8)	309 (30.2)	8.0
			≥80	1408 (3.2)	208 (20.3)	14.8
			Total	44,672	1023	2.3
Livingston and Bucher, 20204	Italy	22,512	0-9	Number of cases not available in the range taken for comparison (age group mentioned as 0-18, 19-50, 51-70 and >70 yr)	0	0
			10-19		0	0
			20-29		0	0
			30-39		4 (0.2)	0.3
			40-49		10 (0.6)	0.4
			50-59		43 (2.6)	1.0
			60-69		139 (8.5)	3.5
			70-79		578 (35.6)	12.5
			80-89		694 (42.7)	19.7
			≥90		156 (9.6)	22.7
			Not reported		1 (0.06)	0.6
			Total	22,512	1625 (100)	7.2
CDC COVID-19 Response Team, USA5	USA	4,226 (confirmed cases - 2,449)	0-19	123 (5)	0	0
			20-44	705 (29)	9 (20)	0.1-0.2*
			45-54	429 (18)	0.5-0.8
			55-64	429 (18)	1.4-2.6
			65-74	409 (17)	20 (46)	2.7-4.9
			75-84		210 (9)	4.3-10.5
			≥85	144 (6)	15 (34)	10.4-27.3
			Total	2449	44	1.8-3.4
Korean Society of Infectious	South Korea	4,212	0-9	32 (1)	0	0
Diseases6			10-19	169 (4)	0	0
			20-29	1235 (30)	0	0
			30-39	506 (12)	1 (4.5)	0.2
			40-49	633 (15)	1 (4.5)	0.2
			50-59	834 (20)	5 (22.7)	0.6
			60-69	530 (12)	6 (27.3)	1.1
			70-79	192 (5)	6 (27.3)	3.1
			≥80	81 (2)	3 (13.6)	3.7
			Total	4,212	22	0.5

*In lower and upper bound ranges