Background: Lithium is still regarded as a cornerstone for the long-term treatment of bipolar disorder. The best response to lithium is associated with clinical features of episodic clinical course, complete remission, bipolar family history and low psychiatric comorbidity. However, a specific personality profile for the best lithium response was not estimated so far. Such a possibility occurred with an advent of temperament scale for bipolar disorder and of an ability to quantitatively assess lithium prophylactic response.
Methods: The study was performed on 71 patients with bipolar mood disorder (21 males, 50 females), aged 31-82 (59±12) years, which have been treated with lithium carbonate for at least 5 years (5-37 years, mean 15 years). In all patients, the assessment of five temperaments of TEMPS-A scale (depressive, cyclothymic, hyperthymic, irritable and anxious) was done, and correlated with the quality of lithium prophylaxis according to Alda scale.
Results: The mean scores for five temperaments of TEMPS-A were not significantly different in male and female patients. The response to lithium correlated significantly positively with hyperthymic temperament score (r=0.31, p=0.009), and negatively with anxiety (r=-0.27, p=0.022), cyclothymic (r=-0.26, p=0.032), and depressive (r=-0.23, p=0.052) temperaments scores.
Limitations: Relatively small number of patients.
Conclusions: The main finding of the study is an association of lithium response with hyperthymic temperament. This positive correlation as well as other negative correlations between lithium response and TEMPS-A temperaments are discussed in view of clinical and genetic findings in bipolar patients.
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