Table 2.
Prevalence and crude prevalence ratios for post-infective syndromes, at population level and among chikungunya virus-infected subjects at onset of infection, TELECHIK cohort study, Reunion island, 2006–2008
| Population level | ||||
|---|---|---|---|---|
| Outcomea | CHIK− (%) | CHIK+ (%) | Crude PR (95% CI) | P value |
| LRMSP | 8.9 | 29.9 | 3.4 (2.4–4.6) | <0.001 |
| ICF | 12.7 | 34.3 | 2.7 (2.0–3.6) | <0.001 |
| CFS-like illness | 6.7 | 21.5 | 3.2 (2.1–4.7) | <0.001 |
| Chikungunya-virus-infected subjects | ||||
| Outcomea | Asymptomatic (%) | Symptomatic (%) | Crude PR (95% CI) (%) | P value |
| LRMSP | 8.7 | 32.9 | 3.7 (1.5–9.0) | 0.003 |
| ICF | 8.5 | 38.7 | 4.5 (2.0–9.9) | <0.001 |
| CFS-like illness | 7.4 | 23.9 | 3.2 (1.4–7.5) | <0.001 |
LRMSP, long-lasting rheumatic musculoskeletal pain; ICF, idiopathic chronic fatigue; CFS, chronic fatigue syndrome.
Prevalence rates are weighted on the sampling fraction and prevalence ratios (PR) are given with 95% confidence intervals (95% CI).
a
Each outcome was identified as persistent, remittent-relapsing or lingering, between its first occurrence at the onset of infection and the week before the TELECHIK survey.