Table 1 Association of CHIKV infection with characteristics of participants, from Sistan and Baluchistan province, southeastern Iran, 2017–2018
Variables | Chik. Neg. (n = 119) (%) | Chik. Pos. (n = 40) (%) | p-value |
|---|---|---|---|
Gender | |||
 Female | 57 (73.1) | 21 (26.9) | 0.584 |
 Male | 62 (76.5) | 19 (23.5) | |
Age (Mean ± SD) | 31.7 ± 15.3 | 41.5 ± 16.3 | 0.001 |
Epidemiological History | |||
 Abroad travelling history, N (%) | 21 (17.6) | 40 (100) | < 0.001 |
 Travel Duration (day) (Mean ± SD) | 15.7 ± 16.7 | 26.83 ± 39.3 | 0.218 |
Country with a travel history | |||
 Afghanistan | 2 (1.7) | 0 (0) | 0.230 |
 Malaysia | 1 (0.8) | 0 (0) | 0.426 |
 Pakistan | 18 (15) | 40 (100) | 0.001 |
City of residence | |||
 Chabahar | 7 (5.9) | 4 (10) | 0.367 |
 Iranshahr | 14 (11.7) | 2 (5) | 0.224 |
 Konarak | 3 (2.5) | 0 (0) | 0.313 |
 Mirjaveh | 2 (1.7) | 0 (0) | 0.411 |
 Qasr-e Qand | 1 (0.8) | 0 (0) | 0.562 |
 Rask | 1 (0.8) | 0 (0) | 0.562 |
 Saravan | 4 (3.4) | 0 (0) | 0.242 |
 Sarbaz | 50 (42) | 26 (65) | 0.010 |
 Zabol | 1 (0.8) | 0 (0) | 0.562 |
 Zahedan | 36 (30.2) | 8(20) | 0.220 |
Villager | 57 (47.9) | 19 (47.5) | 0.451 |
Season of Symptom Onset | |||
 Spring | 34 (28.6) | 19 (47.5) | 0.042 |
 Summer | 48 (40.3) | 8 (20) | |
 Fall | 17 (14.3) | 0 (0) | |
 Winter | 7 (5.9) | 2 (5) | |
Mosquito bite | 30 (25.2) | 8 (20) | 0.096 |
Clinical signs | |||
 Chill | 1 (0.8) | 7 (17.5) | < 0.001 |
 Myalgia | 40 (33.6) | 20 (50) | 0.321 |
 Rash | 5 (4.2) | 2 (5) | 0.646 |
 Headache | 34 (28.6) | 11 (27.5) | 0.020 |
 Conjunctivitis | 11 (9.2) | 2 (5) | 0.064 |
 Retro orbital pain | 14 (11.7) | 3 (7.5) | 0.078 |
 Stomachache | 10 (8.4) | 3 (7.5) | 0.426 |
 Nausea | 18 (15.1) | 7 (17.5) | 0.658 |
 Vomiting | 17 (14.3) | 7 (17.5) | 0.679 |
 Diarrhea | 12 (10) | 7 (17.5) | 0.608 |
Laboratory findings | |||
 Leukopenia | 9 (7.5) | 2 (5) | 0.191 |
 Platelet count(Mean ± SD) | 134,486 ± 113,962 | 131,730 ± 126,948 | 0.958 |
 WBC count(Mean ± SD) | 9940 ± 1720 | 4980 ± 140) | 0.353 |