Factors predictive of serious infections over time in systemic lupus erythematosus patients: data from a multi-ethnic, multi-national, Latin American lupus cohort

V. R. Pimentel-Quiroz, M. F. Ugarte-Gil, G. B. Harvey, D. Wojdyla, G. J. Pons-Estel, R. Quintana, A. Esposto, M. A. García, L. J. Catoggio, M. H. Cardiel, L. A. Barile, M. C. Amigo, E. I. Sato, E. Bonfa, E. Borba, L. T. Lavras Costallat, O. J. Neira, L. Massardo, M. Guibert-Toledano, R. Chacón-DíazG. S. Alarcón, B. A. Pons-Estel

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18 Scopus citations

Abstract

Aim: The aim of this study was to identify factors predictive of serious infections over time in patients with systemic lupus erythematosus (SLE). Methods: A multi-ethnic, multi-national Latin American SLE cohort was studied. Serious infection was defined as one that required hospitalization, occurred during a hospitalization or led to death. Potential predictors included were sociodemographic factors, clinical manifestations (per organ involved, lymphopenia and leukopenia, independently) and previous infections at baseline. Disease activity (SLEDAI), damage (SLICC/ACR Damage Index), non-serious infections, glucocorticoids, antimalarials (users and non-users), and immunosuppressive drugs use; the last six variables were examined as time-dependent covariates. Cox regression models were used to evaluate the predictors of serious infections using a backward elimination procedure. Univariable and multivariable analyses were performed. Results: Of the 1243 patients included, 1116 (89.8%) were female. The median (interquartile range) age at diagnosis and follow-up time were 27 (20–37) years and 47.8 (17.9–68.6) months, respectively. The incidence rate of serious infections was 3.8 cases per 100 person-years. Antimalarial use (hazard ratio: 0.69; 95% confidence interval (CI): 0.48–0.99; p = 0.0440) was protective, while doses of prednisone >15 and ≤60 mg/day (hazard ratio: 4.18; 95 %CI: 1.69–10.31; p = 0.0019) and >60 mg/day (hazard ratio: 4.71; 95% CI: 1.35–16.49; p = 0.0153), use of methylprednisolone pulses (hazard ratio: 1.53; 95% CI: 1.10–2.13; p = 0.0124), increase in disease activity (hazard ratio: 1.03; 95% CI: 1.01–1.04; p = 0.0016) and damage accrual (hazard ratio: 1.22; 95% CI: 1.11–1.34; p < 0.0001) were predictive factors of serious infections. Conclusions: Over time, prednisone doses higher than 15 mg/day, use of methylprednisolone pulses, increase in disease activity and damage accrual were predictive of infections, whereas antimalarial use was protective against them in SLE patients.

Original languageEnglish
Pages (from-to)1101-1110
Number of pages10
JournalLupus
Volume28
Issue number9
DOIs
StatePublished - 1 Aug 2019

Bibliographical note

Publisher Copyright:
© The Author(s) 2019.

Keywords

  • Systemic lupus erythematosus
  • antimalarial use
  • glucocorticoid use
  • serious infections

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