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Cognitive functioning following discontinuation of antipsychotic medication. A naturalistic sub-group analysis from the OPUS II trial
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Cognitive functioning following discontinuation of antipsychotic medication. A naturalistic sub-group analysis from the OPUS II trial
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Journal Article
Cognitive functioning following discontinuation of antipsychotic medication. A naturalistic sub-group analysis from the OPUS II trial
2019
Overview
The effect of antipsychotics medication on cognitive functioning in patients diagnosed with schizophrenia is poorly understood. Some studies of second generation antipsychotics indicated that they improved cognitive functioning while other studies have found that they decrease the level of cognitive functioning.
We included patients with schizophrenia who were in treatment with antipsychotics 1.5 years (baseline) after initiation of treatment and followed them up 3.5 years later (n = 189). At follow-up 60 (32%) had discontinued their antipsychotic treatment and 129 (68%) were still taking antipsychotics. Using the Brief Assessment of Cognition in Schizophrenia (BACS) we assessed cognition at baseline and follow-up.
The patients who discontinued their medication had a higher level of cognitive functioning in all domains at baseline, as well as Global cognitive function [mean z-score -1.50 (s.d. 1.24) v. -2.27 (s.d. 1.30), p = 0.00015]. After controlling for relevant confounders those who discontinued antipsychotic medication improved significantly more than those who remained on antipsychotic medication during the course of the follow-up on the Token Motor task [estimated mean change difference -0.46 (95% CI -0.89 to -0.04)], the Speed of Processing Domain [estimated mean change difference -0.38 (95% CI -0.68 to -0.08)] and global cognition [estimated mean change difference -0.36 (95% CI -0.66 to -0.07)].
Due to the naturalistic design, we cannot conclude on the direction of the relationship between antipsychotics and cognition. There is no evidence that discontinuation of medication had a negative effect on cognitive functioning. Rather, we found that that discontinuation of medication was associated with better cognitive functioning.
Publisher
Cambridge University Press
Subject
/ Antipsychotic Agents - adverse effects
/ Antipsychotic Agents - therapeutic use
/ Changes
/ Cognition Disorders - chemically induced
/ Cognition Disorders - diagnosis
/ Cognition Disorders - psychology
/ Drugs
/ Female
/ Humans
/ Improved cognitive functioning
/ Male
/ Patients
/ Psychiatric Status Rating Scales
/ Schizophrenia - drug therapy
