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22-08-2017 | Uitgave 1/2018

Quality of Life Research 1/2018

Effects of risk factors for and components of metabolic syndrome on the quality of life of patients with systemic lupus erythematosus: a structural equation modeling approach

Quality of Life Research > Uitgave 1/2018
Jeong-Won Lee, Ji-Hyoun Kang, Kyung-Eun Lee, Dong-Jin Park, Seong Wook Kang, Seung-Ki Kwok, Seong-Kyu Kim, Jung-Yoon Choe, Hyoun-Ah Kim, Yoon-Kyoung Sung, Kichul Shin, Sang-Il Lee, Chang Hoon Lee, Sung Jae Choi, Shin-Seok Lee



This study assessed the relationships among the risk factors for and components of metabolic syndrome (MetS) and health-related quality of life (HRQOL) in a hypothesized causal model using structural equation modeling (SEM) in patients with systemic lupus erythematosus (SLE).


Of the 505 SLE patients enrolled in the Korean Lupus Network (KORNET registry), 244 had sufficient data to assess the components of MetS at enrollment. Education level, monthly income, corticosteroid dose, Systemic Lupus Erythematosus Disease Activity Index, Physicians’ Global Assessment, Beck Depression Inventory, MetS components, and the Short Form-36 at the time of cohort entry were determined. SEM was used to test the causal relationship based on the Analysis of Moment Structure.


The average age of the 244 patients was 40.7 ± 11.8 years. The SEM results supported the good fit of the model (χ 2 = 71.629, p = 0.078, RMSEA 0.034, CFI 0.972). The final model showed a direct negative effect of higher socioeconomic status and a positive indirect effect of higher disease activity on MetS, the latter through corticosteroid dose. MetS did not directly impact HRQOL but had an indirect negative impact on it, through depression.


In our causal model, MetS risk factors were related to MetS components. The latter had a negative indirect impact on HRQOL, through depression. Clinicians should consider socioeconomic status and medication and seek to modify disease activity, MetS, and depression to improve the HRQOL of SLE patients.

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