TABLE 2. Number and percentage of persons with West Nile virus nonneuroinvasive and neuroinvasive disease, by selected demographic characteristics, onset of illness, hospitalization, and death — United States, 2009–2018.
| Characteristic | Nonneuroinvasive disease (N = 9,034) |
Neuroinvasive disease (N = 12,835) |
Total (N = 21,869) |
|---|---|---|---|
| No. (%) | No. (%) | No. (%) | |
|
Sex
| |||
| Female |
4,004 (44) |
4,888 (38) |
8,892 (41)
|
| Male |
5,029 (56) |
7,947 (62) |
12,976 (59)
|
| Unknown |
1 (<1) |
0 (0) |
1 (<1)
|
|
Age group (yrs)
| |||
| 0–9 |
99 (1) |
99 (1) |
198 (1)
|
| 10–19 |
366 (4) |
325 (3) |
691 (3)
|
| 20–29 |
628 (7) |
597 (5) |
1,225 (6)
|
| 30–39 |
1,236 (14) |
1,027 (8) |
2,263 (10)
|
| 40–49 |
1,548 (17) |
1,552 (12) |
3,100 (14)
|
| 50–59 |
2,168 (24) |
2,605 (20) |
4,773 (22)
|
| 60–69 |
1,681 (19) |
2,852 (22) |
4,533 (21)
|
| ≥70 |
1,308 (14) |
3,777 (29) |
5,085 (23)
|
| Unknown |
0 (0) |
1 (<1) |
1 (<1)
|
|
Race
| |||
| White |
6,338 (70) |
8,814 (69) |
15,152 (69)
|
| Black |
286 (3) |
904 (7) |
1,190 (5)
|
| American Indian/Alaska Native |
86 (1) |
123 (1) |
209 (1)
|
| Asian/Pacific Islander |
76 (1) |
138 (1)
|
214 (1)
|
| Multiple/Other |
185 (2) |
427 (3) |
612 (3)
|
| Unknown |
2,063 (23) |
2,429 (19) |
4,492 (21)
|
|
Ethnicity
| |||
| Hispanic |
570 (6) |
1,651 (13) |
2,221 (10)
|
| Non-Hispanic |
5,725 (63) |
7,809 (61) |
13,534 (62)
|
| Unknown |
2,739 (30) |
3,375 (26) |
6,114 (28)
|
|
Month of illness onset
| |||
| January–March |
13 (<1) |
16 (<1) |
29 (<1)
|
| April–June |
290 (3) |
302 (2) |
592 (3)
|
| July–September |
8,184 (91) |
11,293 (88) |
19,477 (89)
|
| October–December |
547 (6) |
1,222 (10) |
1,769 (8)
|
| Unknown |
0 (0) |
2 (<1) |
2 (<1)
|
|
Hospitalization
| |||
| Yes |
2,581 (29) |
12,111 (94) |
14,692 (67)
|
| No |
6,265 (69) |
654 (5) |
6,919 (32)
|
| Unknown |
188 (2) |
70 (<1) |
258 (1)
|
|
Death
| |||
| Yes |
45 (<1) |
1,154 (9) |
1,199 (5)
|
| No |
8,579 (95) |
11,165 (87) |
19,744 (90)
|
| Unknown | 410 (5) | 516 (4) | 926 (4) |