Volume 10, Number 8—August 2004
Research
Acute Encephalitis Hospitalizations, California, 1990–1999: Unrecognized Arboviral Encephalitis?
Rosalie T. Trevejo*
Table 2
Characteristics of patients hospitalized with acute infectious or unspecified encephalitis, California, 1990–1999a
| No. of patientsb | 1995 populationc | Rate (95% CI)d | ||
|---|---|---|---|---|
| Sex |
||||
| Male |
6,684 |
16,062,552 |
4.2 (4.1–4.3) |
|
| Female |
7,123 |
16,000,360 |
4.5 (4.3–4.6) |
|
| Age group, y |
||||
| <1 |
868 |
552,649 |
15.7 (14.7–16.8) |
|
| 1–4 |
973 |
2,356,048 |
4.1 (3.9–4.4) |
|
| 5–19 |
2,350 |
6,801,354 |
3.5 (3.3–3.6) |
|
| 20–44 |
4,157 |
12,964,498 |
3.2 (3.1–3.3) |
|
| 45–64 |
2,707 |
5,958,743 |
4.5 (4.4–4.7 |
|
| 65+ |
2,752 |
3,429,620 |
8.0 (7.7–8.3) |
|
| Overall | 13,807 | 32,062,912 | 4.3 (4.2–4.4) | |
aPatients with a concurrent diagnosis of AIDS are excluded.
bSource: Office of Statewide Health Planning and Development, Patient Discharge Data, Public Version A.
cPopulation projections, State of California, Department of Finance.
dCases per 105 person-years = (frequency/[1995 population x 10]) x 100,000; CI = confidence interval.
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