Objective:
The
efficacy of antidepressants in post-stroke depressive symptoms (PSD)
varies. We aimed to examine whether the effect of escitalopram on PSD
differs according to individual depressive symptoms and stroke lesion
location.
Methods:
This is a post hoc analysis of EMOTION (ClinicalTrials.gov,
NCT01278498), a randomized, placebo-controlled, double-blind trial that
examined the efficacy of escitalopram on depression in acute stroke
patients (237 with placebo, 241 with escitalopram). Depressive symptoms
were evaluated with the 10-item Montgomery-Åsberg Depression Rating
Scale (MADRS). Changes in MADRS and individual item scores at 12 weeks
were compared between the treatment groups and among the stroke lesion
location groups. Stroke lesion locations were grouped according to the
anatomical distribution of serotonin fibers that originate from the
midbrain/pons and spread to the forebrain via subcortical structures:
“Midbrain-Pons,” “Frontal-Subcortical,” and “Others.” Least-squares
means were calculated to demonstrate the independent effect of lesion
location.
Results:
Total
MADRS scores decreased more significantly in the escitalopram than in
the placebo group, while a significant effect of escitalopram was
observed in only 3 items: apparent sadness, reported sadness,
pessimistic thoughts. In the lesion location analyses, escitalopram
users in the Frontal-Subcortical group showed significant improvement in
total MADRS scores (placebo [n = 130] vs. escitalopram [n = 148],
least-square mean [95% CI]: -2.3 [-3.5 to -0.2] vs. -4.5 [-5.5 to -3.4],
p = .005), while those in the Midbrain-Pons and Others groups did not.
Conclusions:
The
effect of escitalopram on PSD may be more prominent in patients with
particular depressive symptoms and stroke lesion locations, suggesting
the need for tailored treatment strategies.
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