Table 1. Signs, symptoms, and laboratorial alterations of suspect cases of yellow fever reported by Instituto de Infectologia Emílio Ribas. IIER, 2018.

Signs, symptoms, and laboratorial alterations	Total (n = 113)		Confirmed cases (n = 78)		Discarded cases (n = 35)		p^a

	n	%	n	%	n	%
Fever	111	98.2	77	100.0	31	91.2	0.027
Abdominal pain	109	96.5	45	58.4	16	50.0	0.419
Diarrhea	107	94.7	18	24.0	11	34.4	0.269
Hemorrhage signs	113	100.0	15	19.2	9	25.7	0.436
Renal excretion disorder^b	111	98.2	24	30.8	2	6.1	0.005
Jaundice^b	113	100.0	42	53.8	25	71.4	0.079
Myalgia	105	92.9	62	84.9	24	75.0	0.224
Headache	105	92.9	56	75.7	23	74.2	0.872
Chills	101	89.4	28	38.9	11	37.9	0.929
Nausea	105	92.9	58	77.3	23	76.7	0.941
Vomiting	105	92.9	52	69.3	18	60.0	0.359
Low back pain	98	86.7	36	51.4	20	71.4	0.071
Arthralgia	99	87.6	13	18.6	12	41.4	0.017
Thrombocytopenia	111	98.2	66	86.8	16	45.7	< 0.001
Leukopenia	111	98.2	47	61.8	6	17.1	< 0.001
Leukocytosis	111	98.2	5	6.6	5	14.3	0.281
ALT > 80U/L	111	98.2	76	100.0	22	62.8	< 0 .001
AST > 80U/L	111	98.2	75	98.7	22	62.8	< 0.001
Renal function alteration	111	98.2	36	47.4	12	34.3	0.196
Hyperbilirubinemia	112	99.1	37	48.1	19	54.3	0.541

ALT: alanine aminotransferase; AST: aspartate aminotransferase; 95%CI: 95% confidence interval; OR: odds ratio.

^aPearson qui-square test or Fisher’s exact test.

^bReferred information.