Creuza Rachel Vicente: Department of Social Medicine, Federal University of Espírito Santo, Vitória 29047-105, Espírito Santo State, Brazil. ORCID
Luana Santos Louro: Medical School, Federal University of Espírito Santo, Vitória 29047-105, Espírito Santo State, Brazil.
Nicolli Ribeiro de Jesus: Post-Graduate Program in Infectious Diseases, Federal University of Espírito Santo, Vitória 29047-105, Espírito Santo State, Brazil.
Danielle Torres Dos Santos Lopes: Post-Graduate Program in Infectious Diseases, Federal University of Espírito Santo, Vitória 29047-105, Espírito Santo State, Brazil.
Aline Souza Areias Cabidelle: Health Surveillance Service, Department of Health, Vitória 29017-010, Espírito Santo State, Brazil.
Crispim Cerutti Junior: Department of Social Medicine, Federal University of Espírito Santo, Vitória 29047-105, Espírito Santo State, Brazil. ORCID
Angelica Espinosa Barbosa Miranda: Department of Social Medicine, Federal University of Espírito Santo, Vitória 29047-105, Espírito Santo State, Brazil.
Iuri Drumond Louro: Department of Animal Biology, Federal University of Espírito Santo, Vitória 29075-910, Espírito Santo State, Brazil.
Debora Dummer Meira: Department of Animal Biology, Federal University of Espírito Santo, Vitória 29075-910, Espírito Santo State, Brazil.
Kuan Rong Chan: Program in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore 169857, Singapore. ORCID
Chikungunya patients may develop chronic joint pain that can persist for months to years. This study aimed to determine the factors associated with Chikungunya chronicity. This case-control study involved data from patients with laboratory-confirmed Chikungunya reported from March 2016 to December 2020 in Vitória, Espírito Santo state, Brazil. The data were accessed from compulsory notification databases (SINAN and eSUS VS) and electronic medical reports (Rede Bem-Estar). For each patient who developed chronic symptoms, we included a control patient who did not develop chronic symptoms by random sampling. A total of 183 chronic and 183 non-chronic patients were included in the study. Most of them were female (73.2%), with a median age of 49.5 years (interquartile range = 37-61), and presented fever (89.6%), myalgia (89.6%), arthralgia (89.3%), and headache (82.0%). Chronic patients were older (median = 53; interquartile range = 41-61) than non-chronic cases (median = 46; interquartile age = 31-61) (OR = 0.979, 95% CI = 0.968-0.991) and more frequently presented nausea (58.5% vs. 40.4%; OR = 2.109, 95% CI = 1.374-3.238), and leukopenia (20.2% vs. 10.9%; OR = 2.060, 95% CI = 1.122-3.779). Therefore, these characteristics should be monitored for the better clinical management of cases prone to chronicity.
