Table 1. Participant characteristics by Chikungunya (CHIKV) RT-PCR result.
| total | CHIKV positive (n = 120) | % | CHIKV negative (n = 22) | % | |
|---|---|---|---|---|---|
| Sex | |||||
| Female | 47.9% | 56 | 82.3 | 12 | 17.7 |
| Male | 52.1% | 64 | 86.5 | 10 | 13.5 |
| Age (y), median [IQR] | 22 | 14–40 | 37 | 21–54 | |
| Age Group (y) (n = 141) | |||||
| <2 | 7 | 7 | 5.9 | 0 | 0.0 |
| 2–4 | 6 | 5 | 4.2 | 1 | 4.5 |
| 5–14 | 24 | 22 | 18.5 | 2 | 9.1 |
| 15–29 | 51 | 46 | 38.7 | 5 | 22.7 |
| 30–49 | 33 | 26 | 21.8 | 7 | 31.8 |
| 50+ | 20 | 13 | 10.9 | 7 | 31.8 |
| Occupation (n = 141) | |||||
| < 5 child | 13 | 12 | 10.0 | 1 | 4.8 |
| Schoolchild/student | 49 | 43 | 35.8 | 6 | 28.6 |
| Housewife | 31 | 26 | 21.7 | 5 | 23.8 |
| Farmer/Outdoor worker | 15 | 12 | 10.0 | 3 | 14.3 |
| Professional/Business | 7 | 7 | 5.8 | 0 | 0.0 |
| Health worker | 5 | 3 | 2.5 | 2 | 9.5 |
| Retired/unemployed | 21 | 17 | 14.2 | 4 | 19.0 |
| Median household size (IQR) n = 102 | 8 | 8 | 6–11 | 7 | 5–9 |
Notes: Missing data: age 1, occupation 1, # in household 40. IQR: Interquartile Range
Most participants who provided residence location (69%, 80/116) came from Kassala City sectors 2, 3, 4 and 5 on the banks of the seasonal River Gash, coinciding with areas of greatest flooding in the 2018 rainy season, and with highest case reports during the epidemic. A further 26% (30/116) were from rural areas up to 1.5 hours’ drive away.