Pattern of neuropsychologic dysfunction in inactive systemic lupus erythematosus

Area of Science:

• Neuroscience
• Rheumatology
• Psychology

Background:

• Systemic lupus erythematosus (SLE) is a chronic autoimmune disease with potential central nervous system (CNS) involvement.
• Neuropsychological dysfunction is a recognized complication of SLE, but its prevalence in inactive disease states requires further elucidation.

Purpose of the Study:

• To examine the pattern and prevalence of neuropsychological dysfunction in patients with inactive systemic lupus erythematosus (SLE).
• To compare cognitive functioning in inactive SLE patients with healthy controls.
• To identify factors associated with cognitive impairment in inactive SLE.

Main Methods:

• Fifty-eight subjects with inactive SLE and 47 healthy controls underwent a standardized neuropsychological test battery.
• Cognitive impairment was defined as significant deviation in three or more cognitive process summary scores from premorbid estimates.
• Statistical analyses compared performance between groups and examined associations with age, depressive symptoms, and corticosteroid use.

Main Results:

• Cognitive impairment was identified in 43% of inactive SLE subjects versus 19% of controls.
• SLE patients performed significantly worse in auditory verbal memory, visual spatial memory, psychomotor speed, and motor functioning.
• Only visual spatial memory showed a significantly higher impairment rate in SLE patients compared to controls.
• Cognitive impairment correlated with increasing age in SLE patients, but not with depressive symptoms or corticosteroid use.

Conclusions:

• Cognitive dysfunction is frequent in patients with inactive SLE, indicating potential ongoing subclinical CNS effects.
• The heterogeneous performance patterns suggest varied CNS involvement in SLE.
• Age is a significant factor associated with cognitive impairment in inactive SLE.