Table 1.

Demographic and laboratory data

Characteristic	Value
Demographic (n = 600)
Age (years)
Mean	35
Range	11–68
Sex, M:F	1.1:1
Onset of fever (days)
Median	4
Range	1–30
Clinical (n = 150)
Patients with:
Fever with chills	9 (6%)
Itching	35 (23.3%), severe 2 (1.3%)
Nausea	12 (8%)
Rashes	46 (30.6%), severe 11 (7.3%), moderate 21 (14.0%)
Diarrhoea	2 (1.3%)
Vomiting	5 (3.3%)
Ulcers	2 (1.3%)
Headache	7 (5%)
Musculoskeletal
Swelling	59 (39%), severe 2 (1.3%)
Restricted movement of the joints	146 (97%), extreme 41 (27%)
Backache	3 (2%)
Morning stiffness	32 (21.3)
Body ache	3 (2%)
Pedal oedema	22 (14.6%)
Partial paraparesis	4 (2.6%)
Comorbid Conditions (n = 12)
Hypotension with additional complications	3 (2%)
Hypertonia	2 (1.3%)
Decreased sensation of pain, touch and temperature	2 (1.3%)
Lipoma in head	2 (1.3%)
Chest pain	2 (1.3%)
Encephalopathy and encephalitis	2 (1.3%)
Dermatomyositis	1 (0.5%)
Respiratory presentation	1 (0.5%)
Severe thrombocytopenia	1 (0.5%)
Demyelinating disorder presenting as traverse myelitis	1 (0.5%)
Intrauterine death	1 (0.5%)
Mortality rate	2 (1.3%)
Diagnostics (n = 600)
CHIKV IgM positive	420 (70%)
CHIKV qPCR positive	145 (24.17%)
CHIKV IgM and qPCR positive	40 (6.67%)
Only CHIKV IgM positive (CHIKV qPCR negative)	244 (40.67%)
Only CHIKV qPCR positive (CHIKV IgM negative)	103 (17.17%)
DENV IgM positive	168 (28%)
DENV NS1 positive	3 (0.5%)
ZIKV qPCR	0
Coinfection Status (n = 600)
CHIKV/DENV
CHIKV qPCR/DENV IgM	40 (6.67%)
CHIKV qPCR/DENV NS1	0 (0%)
CHIKV IgM/DENV IgM	112 (18.67%)
CHIKV IgM/DENV NS1	1 (0.5%)
Overall coinfection (CHIKV IgM/qPCR/DENV IgM/NS1	152 (25.33%)

CHIKV, chikungunya virus; DENV, dengue virus; qPCR, quantitative real-time PCR; ZIKV, Zika virus.