evaluation of symptomatic or asymptomatic patients [3]. The risk factors for AVN in SLE patients were shown to be young age, sex, cushingoid body habitus, Raynaud's phenomenon, thrombophlebitis, vasculitis, nephritis, cerebritis, interstitial pneumonitis, pleural effusion, antiphospholipid syndrome, preeclampsia, hypertension, anemia, thrombocytopenic thrombotic purpura, smoking, and migraine [4]. The objective of this study was to evaluate associated factors for the development of AVN in our SLE cohort.
Materials and methodsA total of 127 consecutive SLE patients (86.6% female) were enrolled in this cross-sectional study during 10 months in our outpatient clinic. Ethical approval was received from the local ethical committee. Inclusion criteria of this study were being ≥18 years old and fulfillment of the 1997 American College of Rheumatology (ACR) revised criteria for the classification of SLE [5].Demographic data, clinical, and laboratory features were recorded from a standard questionnaire and from the patients' files. Potential associated factors of AVN such as sex, age, body mass index, age at disease diagnosis, disease duration, smoking history, hypertension, diabetes mellitus, coronary artery disease, hyperlipidemia, anemia, osteoporosis, menopause, SLE disease activity score, antiphospholipid antibodies positivity, and corticosteroid usage were noted.SLE disease activity index score (SLEDAI-2K) [6] was recorded for assessment of disease activity. SLEDAI scores were also calculated according to the situation 6 months prior to AVN diagnosis.Background/aim: Avascular necrosis (AVN) is the death of bone due to compromise of blood flow. The etiology of AVN is multifactorial; corticosteroid usage is the second most significant factor after trauma, and systemic lupus erythematosus (SLE) is the most common underlying disease. The objective of this study was to assess the factors of AVN in SLE patients.
Materials and methods:The study included 127 patients with SLE who fulfilled 1997 American College of Rheumatology (ACR) revised criteria. Demographic data, age at SLE diagnosis, disease duration, disease activity, body mass index, clinical findings, antiphospholipid syndrome, steroid usage, dose and duration, comorbid diseases, and smoking history were recorded.Results: AVN was found in 11 of 127 (8.7%) SLE patients. Hyperlipidemia (P < 0.001), cushingoid body habitus (P < 0.001), and proteinuria (P = 0.013) were found at higher rates in the AVN group. All of the 11 AVN cases had osteoporosis (P < 0.02). In multivariate regression analysis, daily steroid usage was the only factor for development of AVN in SLE.
Conclusion:The hypothesis of our study was that an alternate day steroid regimen may decrease AVN frequency in SLE patients.