Clinical, Serological, and Molecular Observations from a Case Series Study during the Asian Lineage Zika Virus Outbreak in Grenada during 2016

Table 2

Symptoms most commonly reported among symptomatic cases during the 2016 Zika outbreak in Grenada, showing the odds ratio for testing positive or negative with rash as statistically highly significant () and the odds ratio for lymphadenopathy as statistically significant ().

Symptom indicative of testing positive for ZIKV	ZIKV-positive cases (proportion of 191)	ZIKV-negative cases (proportion of 233)	Odds ratio (95% CI)
Rash	154 (81%)	150 (64%)	2.4 (1.5 to 3.7)
Lymphadenopathy	38 (20%)	30 (13%)	1.7 (1.0 to 2.9)
Nausea/vomiting	38 (20%)	32 (14%)	1.6 (0.9 to 2.6)
Diarrhea	26 (14%)	28 (12%)	1.2 (0.7 to 2.1)
Fever	112 (59%)	137 (59%)	1.0 (0.7 to 1.5)
Headache	74 (38%)	92 (40%)	1.0 (0.7 to 1.4)
Chills	48 (25%)	58 (25%)	1.0 (0.7 to 1.6)
Eye pain	67 (35%)	86 (37%)	0.9 (0.6 to 1.4)
Body pain	68 (36%)	98 (42%)	0.8 (0.5 to 1.1)
Joint pain	97 (51%)	144 (62%)	0.6 (0.4 to 1.0)