Table 1. Number of hospitalizations for subarachnoid hemorrhage (ruptured cerebral aneurysm) and unruptured cerebral aneurysm within the Brazilian National Health System and hospitalization rates (per million inhabitants/year), according to embolization procedure or brain microsurgery, by sex and age group, Brazil, 2009-2018.

Age group (in years)	Embolization (hospitalization per million inhabitants/year)						Brain microsurgery (hospitalization per million inhabitants/year)
	Male		Female		Total		Male		Female		Total
	n	Rate	n	Rate	n	Rate	n	Rate	n	Rate	n	Rate
< 1	11	0.7	19	1.3	30	1.0	9	0.6	10	0.7	19	0.6
1-4	34	0.6	8	0.1	42	0.4	9	0.1	7	0.1	16	0.1
5-9	16	0.2	14	0.2	30	0.2	27	0.3	12	0.2	39	0.3
10-14	49	0.6	23	0.3	72	0.4	42	0.5	46	0.6	88	0.5
15-19	127	1.5	52	0.6	179	1.0	131	1.5	76	0.9	207	1.2
20-24	174	2.0	112	1.3	286	1.7	143	1.6	140	1.6	283	1.6
25-29	171	2.0	236	2.7	407	2.4	239	2.8	279	3.2	518	3.0
30-34	288	3.5	470	5.6	758	4.6	354	4.3	569	6.8	923	5.6
35-39	358	4.9	868	11.2	1,226	8.1	486	6.7	1,020	13.4	1,506	10.1
40-44	515	7.8	1,601	22.8	2,116	15.5	744	11.3	1,737	24.9	2,481	18.3
45-49	744	12.3	2,332	35.9	3,076	24.5	926	15.4	2,640	40.8	3,566	28.6
50-54	778	14.6	2,534	43.3	3,312	29.6	1,040	19.9	2,721	47.2	3,761	34.2
55-59	758	17.2	2,435	48.9	3,193	34.0	992	22.9	2,398	49.2	3,390	36.9
60-64	618	17.6	1,990	49.4	2,608	34.6	760	22.3	1,869	47.3	2,629	35.7
65-69	410	15.8	1,481	47.9	1,891	33.2	455	17.9	1,169	38.7	1,624	29.1
70-74	249	13.3	902	38.4	1,151	27.2	241	13.2	662	28.8	903	21.8
75-79	114	9.0	489	28.6	603	20.2	129	10.6	322	19.4	451	15.6
≥ 80	55	4.2	270	12.7	325	9.4	71	5.6	147	7.1	218	6.5
Total	5,469	5.6	15,836	15.5	21,305	10.6	6,798	7.0	15,824	15.5	22,622	11.3