Table 1. Bivariable associations between select characteristics of patients of the APCF of the EWMSC, T&T (Dec 2013 –Nov 2014) and having a confirmed infection ⱡ with CHIKV.
| Parameters | Not confirmed | Confirmed | p-value | ||
|---|---|---|---|---|---|
| n | (%) | n | (%) | ||
| Demographics | |||||
| Age, years | |||||
| <32 | 64 | (50.0) | 11 | (36.7) | 0.188 |
| >32 | 64 | (50.0) | 19 | (63.3) | |
| Sex | |||||
| Male | 68 | (53.1) | 11 | (36.7) | 0.105 |
| Female | 60 | (46.9) | 19 | (63.3) | |
| Marital status | |||||
| Not married a | 58 | (47.5) | 7 | (26.9) | 0.054† |
| Married (including common-law) | 64 | (52.5) | 19 | (73.1) | |
| Nationality | |||||
| Not Trinidadian or Tobagonian | 24 | (18.8) | 10 | (33.3) | 0.080† |
| Trinidadian or Tobagonian | 104 | (81.3) | 20 | (66.7) | |
| Risk factors | |||||
| Travelled outside of Trinidad in the 2 weeks prior to interview | 6 | (5.0) | 5 | (16.7) | 0.044* |
| Previous dengue | 32 | (26.0) | 2 | (6.9) | 0.026* |
| Clinical factors | |||||
| Headache | 108 | (84.4) | 23 | (76.7) | 0.313 |
| Muscle pain | 81 | (63.3) | 21 | (70.0) | 0.489 |
| Joint pain | 78 | (60.9) | 25 | (83.3) | 0.020* |
| Rash | 24 | (18.8) | 10 | (33.3) | 0.080† |
| Sore throat | 29 | (22.7) | 1 | (3.3) | 0.015* |
| Abdominal pain | 40 | (31.2) | 2 | (6.7) | 0.006** |
| Any haemorrhagic manifestation b | 23 | (18.0) | 3 | (10.0) | 0.414 |
| Mean | (s.d.) ‡ | Mean | (s.d.) ‡ | p-value | |
| Days post onset of fever | 3.33 | (1.96) | 2.39 | (1.77) | 0.021* |
| White blood cell count (103/ml) | 8.36 | (4.85) | 6.52 | (3.25) | 0.016* |
| Haematocrit (%) | 43.81 | (23.7) | 39 | (7.99) | 0.276 |
| Platelet count (103/ml) | 213.2 | -100.86 | 234.6 | (72.48) | 0.277 |
A more comprehensive list of variables is presented in S2 Table.
ⱡ Defined as a positive result by RT-qPCR
† p<0.10
*p<0.05
**p<0.01
‡ Standard deviation
a Includes: single, divorced and widower
b Includes: nose bleed, gum bleed, abnormal vaginal bleeding, blood in urine, bruising or blood in stool