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Volume 10, Number 8—August 2004

Research

Acute Encephalitis Hospitalizations, California, 1990–1999: Unrecognized Arboviral Encephalitis?

Rosalie T. Trevejo*Comments to Author 
Author affiliation: *Western University, Pomona, California, USA

Main Article

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.

Main Article

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