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Statins and cognition in late-life bipolar disorder.
International Journal of Geriatric Psychiatry 2018 October
OBJECTIVES: Recent data suggests that statins have positive effects on cognition in older adults. Studies in patients with mood disorders have found contradicting positive and negative effects of statins on mood and cognition, with limited data in bipolar disorder (BD). The objective of this study was to assess the association between statin use and cognition in older adults with BD.
METHODS: In a cross-sectional sample of 143 euthymic older adults with BD (age ≥ 50), statin users (n = 48) and nonusers (n = 95) were compared for cognitive outcomes: Global and cognitive domain z-scores were calculated from detailed neuropsychological batteries using normative data from healthy comparators (n = 87).
RESULTS: The sample had a mean age of 64.3 (±8.9) years, 65.0% were female, with an average of 15.1 (±2.79) years of education. Statin users did not differ from nonusers on global (-0.60 [±0.69] vs -0.49 [±0.68], t[127] = 0.80, P = .42) or individual cognitive domains z-score.
CONCLUSIONS: In older patients with BD, statin use is not independently associated with cognitive impairment. This suggests that in older BD patients, the cognitive dysfunction associated with BD trumps the potential cognitive benefit that is associated with statins in older adults without a psychiatric disorder. Further, statins do not seem to exacerbate this cognitive dysfunction. Future longitudinal studies are needed to confirm these findings.
METHODS: In a cross-sectional sample of 143 euthymic older adults with BD (age ≥ 50), statin users (n = 48) and nonusers (n = 95) were compared for cognitive outcomes: Global and cognitive domain z-scores were calculated from detailed neuropsychological batteries using normative data from healthy comparators (n = 87).
RESULTS: The sample had a mean age of 64.3 (±8.9) years, 65.0% were female, with an average of 15.1 (±2.79) years of education. Statin users did not differ from nonusers on global (-0.60 [±0.69] vs -0.49 [±0.68], t[127] = 0.80, P = .42) or individual cognitive domains z-score.
CONCLUSIONS: In older patients with BD, statin use is not independently associated with cognitive impairment. This suggests that in older BD patients, the cognitive dysfunction associated with BD trumps the potential cognitive benefit that is associated with statins in older adults without a psychiatric disorder. Further, statins do not seem to exacerbate this cognitive dysfunction. Future longitudinal studies are needed to confirm these findings.
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