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Table 2 Baseline characteristics of patients seeking care due symptoms compatible with Zika in Tapachula, Chiapas (Mexico, 2015–2018) (N = 427)

From: Different epidemiological profiles in patients with Zika and dengue infection in Tapachula, Chiapas in Mexico (2016–2018): an observational, prospective cohort study

Clinical manifestation Zika (n = 37) Dengue (n = 82) Unidentified illness episode (n = 307)
Days between first symptom and visit 3 (0–6) * 5 (1–7)*,≠ 4 (0–7)
 < 18 year old 4 (3–5) 5 (1–7) 4 (1–7)
 18–64 year old 3 (0–6) 5.0 (1–7) 4.0 (0–7)
 > 65 year old 5.0 (5–5) 4.0 (1–6)
Fever, (> 37.2 °C)1 26 (70.3%)* 78 (95.1%)*,≠ 258 (84%)
 < 18 year old 2 (100.0%) 25 (100.0%) 37 (88.1%)
 18–64 year old 23 (65.7%) 52 (92.9%) 212 (82.8%)
 > 65 year old 1 (100.0%) 9 (100.0%)
Days between onset of fever and visit 3 (0–6)*,# 5 (1–7) *,≠ 3 (0–7)≠,#
 < 18 year old 2.5 (2–3) 5.0 (1–7) 4.0 (0–7)
 18–64 year old 3.0(0–6) 4.5 (1–7) 3.0 (0–7)
 > 65 year old 5.0 (5–5) 4.0 (1–6)
Conjunctivitis1 17 (45.9%) 30 (36.6%) 126 (41%)
 < 18 year old 0 (0.0%) 12 (48.0%) 14 (33.3%)
 18–64 year old 16 (45.7%) 17 (30.4%) 104 (40.6%)
 > 65 year old 0 (0.0%) 6 (66.7%)
Days between onset of conjunctivitis and visit 2 (0–5)*,# 4 (1–7)*,≠ 3 (0–7)≠,#
 < 18 year old 3.5 (1–7) 3.0 (1–6)
 18–64 year old 2.0 (0–5) 5.0 (2–7) 3.0 (0–7)
 > 65 year old 4.5(1–6)
Rash1 22 (59.5%)# 48 (58.5%) 111 (36.2%)≠,#
 < 18 year old 0 (0.0%) 17 (68.0%) 17 (40.5%)
 18-64 year old 21 (60.0%) 29 (51.8%) 90 (35.2%)
 > 65 year old   1 (100.0%) 4 (44.4%)
Days between onset of rash and visit 2 (0–6) 3 (0–7) 2 (0–7)
 < 18 year old 3.0 (1–7) 2.0 (0–6)
 18–64 year old 2.0 (0–6) 2.0 (0–7) 2.0(0–7)
 > 65 year old   5.0 (5–5) 1.5 (1–3)
  1. 1One or more of these were part of entry criteria. *p-value < 0.005 for the comparison of Zika and Dengue; #p-value < 0.05 for the comparison of ZikV and UIE ≠ p-value < 0.05 for the comparison of Dengue and UIE. Comparisons with Fisher’s exact test for categorical variables and Wilcoxon rank sum test for continuous