Volume 27, Number 10—October 2021
Research
Burden of Influenza-Associated Respiratory Hospitalizations, Vietnam, 2014–2016
Table 3
National influenza-associated acute respiratory infection (ARI) and severe acute respiratory infection (SARI) hospitalization and rate estimates, Vietnam, 2014–2016
Year and age group, y | ARI hospitalizations, no. (95% UI) |
SARI hospitalizations, no. (95% UI) |
|||||
---|---|---|---|---|---|---|---|
Mean regional rate | Mean regional influenza-associated rate | Extrapolated national influenza-associated cases | Mean regional rate | Mean regional influenza-associated rate | Extrapolated national influenza-associated cases | ||
Mean annual | |||||||
All | 1,263 (1,248–1,278) |
218 (197–238) |
199,368 (180,126–217,895) |
791 (779–803) |
134 (119–149) |
122,832 (109,263–136,377) |
|
<5 | 9,530 (9,372–9,693) |
1,508 (1,272–1,745) |
114,338 (96,479–132,357) |
7,103 (6,966–7,236) |
1,123 (946–1,301) |
85,191 (71,749–98,623) |
|
5–49 | 257 (253–260) |
56 (53–60) |
36,738 (34,767–39,225) |
146 (143–148) |
32 (30–34) |
20,876 (19,660–22,312) |
|
50–64 | 690 (658–717) |
155 (132–181) |
20,150 (17,093–23,480) |
272 (253–291) |
61 (51–72) |
7912 (6,654–9,354) |
|
>65 |
3,776 (3,730–3,820) |
600 (545–656) |
34,527 (31,367–37,757) |
1,301 (1,275–1,326) |
207 (186–227) |
11,883 (10,729–13,064) |
|
2014 | |||||||
All | 1,181 (1,167–1,196) |
142 (128–157) |
129,019 (116,354–142,617) |
748 (737–759) |
87 (77–97) |
78,905 (70,212–88,261) |
|
<5 | 9,201 (9,051–9,358) |
942 (792–1105) |
71,035 (59,718–83,357) |
6,843 (6,714–6,970) |
698 (587–818) |
52,663 (44,230–61,689) |
|
5–49 | 223 (218–228) |
41 (38–44) |
26,821 (24,830–28,928) |
127 (123–131) |
24 (22–26) |
15,326 (14,149–16,601) |
|
50–64 | 606 (582–629) |
91 (74–113) |
11,341 (9,219–13,987) |
242 (226–258) |
37 (29–46) |
4,553 (3,587–5,681) |
|
>65 |
3,446 (3,380–3,519) |
427 (355–504) |
24,073 (20,032–28,429) |
1,195 (1,154–1,236) |
147 (120–177) |
8,307 (6,781–9,969) |
|
2015 | |||||||
All | 1,197 (1,182–1,212) |
214 (175–254) |
195,795 (160,673–232,667) |
751 (739–762) |
134 (107–164) |
123,124 (98,168–149,830) |
|
<5 | 9,114 (8,961–9,270) |
1,642 (1,183–2,115) |
124,690 (89,882–160,624) |
6,798 (6,666–6,927) |
1,226 (886–1,583) |
93,111 (67,328–120,261) |
|
5–49 | 233 (228–238) |
40 (36–46) |
26,219 (23,210–30,057) |
131 (128–135) |
23 (20–26) |
14,803 (13,087–17,042) |
|
50–64 | 655 (619–686) |
128 (96–160) |
16,572 (12,422–20,720) |
260 (239–282) |
50 (37–64) |
6,514 (4,811–8,362) |
|
>65 |
3,594 (3,524–3,661) |
613 (506–722) |
35,180 (29,065–41,434) |
1,233 (1,195–1,268) |
210 (173–250) |
12,073 (9916–14,337) |
|
2016 | |||||||
All | 1,409 (1,391–1,426) |
295 (273–318) |
273,357 (252,921–294,062) |
874 (860–887) |
180 (165–195) |
166,505 (152,831–180,715) |
|
<5 | 10,271 (10,095–10,450) |
1,935 (1,705–2,185) |
147,341 (129,794–166,383) |
7,664 (7,507–7,810) |
1,443 (1,267–1,625) |
109,840 (96,439–123,710) |
|
5–49 | 314 (308–319) |
87 (81–94) |
57,237 (53,188–61,587) |
178 (174–182) |
50 (46–54) |
32,533 (30,011–35,101) |
|
50–64 | 799 (763–831) |
240 (196–283) |
32,395 (26,510–38,173) |
312 (291–332) |
93 (77–111) |
12,613 (10,375–15,037) |
|
>65 | 4,264 (4,193–4,332) |
752 (657–867) |
44,234 (38,629–51,022) |
1,468 (1,426–1,506) |
259 (225–299) |
15,238 (13,251–17,595) |
*Rates are given per 100,000 population and age-adjusted unless shown for a single age group. Rates were calculated regionally using reported ARI hospitalizations multiplied by the percentage of patients meeting the SARI criteria upon medical chart review. Regional hospitalization counts were multiplied by the national percentage of specimens testing influenza-positive from SARI sentinel surveillance, adjusted by age and month, and then divided by the combined population of the regions. ARI, acute respiratory infection; SARI, severe acute respiratory infection; UI, uncertainty interval.
1These authors contributed equally to this article.