TY - JOUR
T1 - Systemic lupus erythematosus impairs memory cognitive tests not affected by depression
AU - Calderón, J.
AU - Flores, P.
AU - Babul, M.
AU - Aguirre, J. M.
AU - Slachevsky, A.
AU - Padilla, O.
AU - Scoriels, L.
AU - Henríquez, C.
AU - Cárcamo, C.
AU - Bravo-Zehnder, M.
AU - González, A.
AU - Massardo, L.
N1 - Funding Information:
This work received financial support from CONICYT grant # PFB12/2007 and FONDECYT grant # 1110849.
PY - 2014/9
Y1 - 2014/9
N2 - Objective: Our aim was to assess the contribution of depression to cognitive impairment in patients with systemic lupus erythematosus (SLE). Methods: Clinical features, education, age, and Hospital Anxiety and Depression Scale (HADS) were evaluated in 82 patients with SLE and 22 healthy controls, all Chilean women. The Cambridge Neuropsychological Test Automated Battery (CANTAB eclipseTM) assessing attention, spatial memory, and learning and executive function domains was applied. Cognitive deficit definition: a cut-off for definite impairment was defined as a score below -2 standard deviations in at least one outcome measure in two or more domains. ANCOVA with stepwise selection evaluated influences of health status (SLE or control), age, education, and HADS depression and anxiety scores on cognitive outcomes. To avoid overfitting, a shrinkage method was performed. Also, adjusted p-values for multiple comparisons were obtained. Results: Cognitive deficit affected 16 (20%) patients, and no controls (p=0.039). Median HADS depression score in SLE patients was 6 (range 0-19) and in controls was 0 (0-19), p<0.001). ANCOVA and shrinkage models showed that worse cognitive performance in sustained attention and spatial working memory tests was explained by the presence of SLE but not depression, whereas depression only affected a measure of executive function (I/ED Stages completed). Conclusion: Depression has a limited role in cognitive impairment in SLE. Impairments in sustained attention and spatial working memory are distinctly influenced by yet-unknown disease-intrinsic factors.
AB - Objective: Our aim was to assess the contribution of depression to cognitive impairment in patients with systemic lupus erythematosus (SLE). Methods: Clinical features, education, age, and Hospital Anxiety and Depression Scale (HADS) were evaluated in 82 patients with SLE and 22 healthy controls, all Chilean women. The Cambridge Neuropsychological Test Automated Battery (CANTAB eclipseTM) assessing attention, spatial memory, and learning and executive function domains was applied. Cognitive deficit definition: a cut-off for definite impairment was defined as a score below -2 standard deviations in at least one outcome measure in two or more domains. ANCOVA with stepwise selection evaluated influences of health status (SLE or control), age, education, and HADS depression and anxiety scores on cognitive outcomes. To avoid overfitting, a shrinkage method was performed. Also, adjusted p-values for multiple comparisons were obtained. Results: Cognitive deficit affected 16 (20%) patients, and no controls (p=0.039). Median HADS depression score in SLE patients was 6 (range 0-19) and in controls was 0 (0-19), p<0.001). ANCOVA and shrinkage models showed that worse cognitive performance in sustained attention and spatial working memory tests was explained by the presence of SLE but not depression, whereas depression only affected a measure of executive function (I/ED Stages completed). Conclusion: Depression has a limited role in cognitive impairment in SLE. Impairments in sustained attention and spatial working memory are distinctly influenced by yet-unknown disease-intrinsic factors.
KW - Cognitive
KW - Depression
KW - Dysfunction
KW - Neuropsychiatric lupus
KW - Systemic lupus erythematosus
UR - http://www.scopus.com/inward/record.url?scp=84906669190&partnerID=8YFLogxK
U2 - 10.1177/0961203314536247
DO - 10.1177/0961203314536247
M3 - Article
C2 - 24879658
AN - SCOPUS:84906669190
SN - 0961-2033
VL - 23
SP - 1042
EP - 1053
JO - Lupus
JF - Lupus
IS - 10
ER -