Table 2.

Symptoms of study participants with viral infections of the central nervous system

		Viral PCR binary				P	Odds Ratio	95% Confidence Interval
		Negative		Positive				Lower	Upper
		n	%	n	%
Fever	Yes	1331	96.9	311	95.7	0.289	1.393	0.753	2.579
	No	43	3.1	14	4.3
Neck rigidity	Yes	374	36.0	86	36.1	0.968	0.994	0.741	1.333
	No	665	64.0	152	63.9
Vomiting	Yes	737	61.8	173	63.1	0.675	0.944	0.719	1.238
	No	456	38.2	101	36.9
Headache	Yes	472	47.3	121	50.8	0.325	0.868	0.654	1.151
	No	526	52.7	117	49.2
Seizures	Yes	685	58.1	160	59.9	0.575	0.925	0.706	1.213
	No	495	41.9	107	40.1
Altered consciousness	Yes	677	62.9	157	64.3	0.677	0.940	0.704	1.256
	No	399	37.1	87	35.7
Bulging fontanel	Yes	74	8.6	25	12.4	0.094	0.664	0.410	1.075
	No	785	91.4	176	87.6
Irritability	Yes	314	32.3	70	32.0	0.922	1.016	0.742	1.391
	No	658	67.7	149	68.0