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Table 1 Sociodemographic characteristics of patients with symptoms compatible with Zika1 in Tapachula, Chiapas, Mexico (June 2016-August 2018)

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

Characteristic3 Type of confirmed infection2 (n = 427)
Zika (n = 37) Dengue (n = 82) Undefined illness episode (n = 307) Household Cohort (n = 103)
Female4 23 (62.2%) 43 (52.4%) 190 (61.9%) 57 (55.3%)
Age 33 (13, 59) 22.5 (6, 68) 31 (5, 76) 39 (3.91)
 < 18 year old 2 (5.4%) 25 (30.5%) 42 (13.7%) 9 (8.7%)
 ≥ 18–65 year old 35 (94.6%) 57 (69.5%) 265 (86.3%) 91(88.3)
 > 65 year old 0 (0.0%) 1 (1.2%) 9(2.9%) 3 (2.9%)
Education
 No school 2 (5.4%) 3 (3.7%) 11 (3.6%) 10 (9.7%)
 Basic (Degrees 1–6) 4 (10.8%) 25 (30.5%) 44 (14.3%) 12 (11.7%)
 Highschool (7–12) 13 (35.1%) 35 (42.7%) 114 (37.1%) 30 (29.1%)
 College 16 (43.2%) 11 (13.4%) 104 (33.9%) 30 (29.1%)
 Postgraduate 2 (5.4%) 8 (9.8%) 33 (10.7%) 2 (1.9%)
Race/ethnicity
 White 7 (18.9%) 19 (23.2%) 78 (25.4%) 6 (5.8%)
 Indigenous 0 (0%) 1 (1.2%) 1 (0.3%) 0 (0.0%)
 Mestizo 30 (81.1%) 62 (75.6%) 227 (73.9%) 97 (94.2%)
Location
 Tapachula 20 (54.1%) 49 (59.8%) 239 (77.9%) 72 (69.9%)
 Other 17 (45.9%) 33 (40.2%) 68 (22.1%) 31 (30.1%)
Comorbidities
 Skin diseases 0 (0%) 0 (0%) 1 (0.3%) 1 (1.0%)
 Hypertension 2 (5.4%) 2 (2.4%) 23 (7.5%) 15 (14.6%)
 Diabetes 2 (5.4%) 0 (0%) 8 (2.6%) 13 (12.6%)
 Arthritis/Osteoarthritis 0 (0%) 0 (0%) 5 (1.6%) 6 (5.8%)
 Chronic peripheral neuropathy 0 (0%) 1 (1.2%) 5 (1.6%) 6 (5.8%)
 Guillain–Barre Syndrome 0 (0%) 0 (0%) 1 (0.3%) 1 (1.0%)
 HIV 0 (0%) 0 (0%) 1 (0.3%) 0 (0.0%)
  1. 1Probable Zika infection cases were defined using a modified version of the World Health Organization and the Pan American Health Organization definition [6] which comprised any two of the following symptoms: rash or elevated body temperature (> 37.2 °C) accompanied with at least one of the following symptoms: arthralgia, myalgia, non-purulent conjunctivitis or conjunctival hyperemia, or headache or malaise in the 7 previous days before the initial visit, with no obvious alternative diagnosis to explain the symptoms. 2Confirmed Zika and dengue infections were defined as the presence of viral RNA in serum or urine samples at any time during follow-up [14]. The absence of Zika, chikungunya and dengue RNA in serum or urine samples at any time during follow-up was defined as an undefined illness episodes (UIE). 3Continuous variables are summarized using medians and range. 4Six (26%) of the 23 women in the Zika group were pregnant, two (8%) in the dengue group and 13 (56%) in the UIE. There were no pregnancies in the household cohort