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TABLE 3

Demographic and Clinical Differences Between Infectious and Autoimmune Encephalitis

EtiologyInfectious Encephalitis (n = 73), /n (%)Autoimmune Encephalitis (n = 60), n (%)POR (95% CI)
Male sex 48 (66) 25 (42) .005 2.7 (1.3–5.8) 
Age 8 y or older 28 (38) 32 (53) .08 0.54 (0.3–1.2) 
Race or ethnicity other than white, non-Hispanic 42 (58) 44 (73) .06 0.49 (0.2–1.1) 
Immune compromiseda 12 (16) 2 (3) .02 5.7 (1.2–54.1) 
New onset seizure 45 (62) 39 (65) .07 0.87 (0.4–1.9) 
Abnormal MRI 53 out of 68 (78) 33 out of 59 (56) .008 2.8 (1.2–6.5) 
Abnormal EEG 47 out of 53 (89) 33 out of 42 (79) .18 2.1 (0.6–8.0) 
Hospitalized 7 d or longer 56 (77) 54 (90) .04 0.37 (0.1–1.1) 
EtiologyInfectious Encephalitis (n = 73), /n (%)Autoimmune Encephalitis (n = 60), n (%)POR (95% CI)
Male sex 48 (66) 25 (42) .005 2.7 (1.3–5.8) 
Age 8 y or older 28 (38) 32 (53) .08 0.54 (0.3–1.2) 
Race or ethnicity other than white, non-Hispanic 42 (58) 44 (73) .06 0.49 (0.2–1.1) 
Immune compromiseda 12 (16) 2 (3) .02 5.7 (1.2–54.1) 
New onset seizure 45 (62) 39 (65) .07 0.87 (0.4–1.9) 
Abnormal MRI 53 out of 68 (78) 33 out of 59 (56) .008 2.8 (1.2–6.5) 
Abnormal EEG 47 out of 53 (89) 33 out of 42 (79) .18 2.1 (0.6–8.0) 
Hospitalized 7 d or longer 56 (77) 54 (90) .04 0.37 (0.1–1.1) 
a

Cell value <5, so Fisher exact was used to calculate 2-tailed P value.

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