Kareen K. Akiskal

Current research on affective temperaments.

PURPOSE OF REVIEW The aim of this review is to highlight the relationship between affective temperaments and clinical mood disorders and to summarize the earlier and most recent studies on affective temperaments in both clinical and nonclinical populations. RECENT FINDINGS Current research findings show that specific affective temperament types (depressive, cyclothymic, hyperthymic, irritable and anxious) are the subsyndromal (trait-related) manifestations and commonly the antecedents of minor and major mood disorders. Up to 20% of the population has some kind of marked affective temperaments; depressive, cyclothymic and anxious temperament is more frequent in women, whereas hyperthymic and irritable temperaments predominate among men. Molecular genetic studies show a strong involvement of the central serotonergic (depressive, cyclothymic, irritable and anxious temperaments) and dopaminergic (hyperthymic temperament) regulation, suggesting that the genetic potential of major mood episodes lies in these temperaments. SUMMARY Premorbid affective temperament types have an important role in the clinical evolution of minor and major mood episodes including the direction of the polarity and the symptom formation of acute mood episodes. They can also significantly affect the long-term course and outcome including suicidality and other forms of self-destructive behaviours such as substance use and eating disorders.

Temperament and Personality Dimensions in Suicidal and Nonsuicidal Psychiatric Inpatients

Background: Suicide is a serious public health problem. In the international literature there is evidence to support the notion that certain temperaments and personality traits are often associated with suicidal behavior. Sampling and Methods: In this study, 150 psychiatric inpatients were investigated using the Temperament Evaluation of Memphis, Pisa, Paris and San Diego autoquestionnaire, the Minnesota Multiphasic Personality Inventory, 2nd edition (MMPI-2) and the Beck Hopelessness Scale and evaluated for suicide risk by means of the critical items of the Mini International Neuropsychiatric Interview. Results: Statistical analysis, including logistic regression analysis and multiple regression analysis, showed that suicide risk contributed to the prediction of hopelessness. Among the temperaments, only the hyperthymic temperament, as a protective factor, and the dysthymic/cyclothymic/anxious temperament contributed significantly to the prediction of hopelessness. Irritable temperament and social introversion were predictive factors for suicidal risk. Hopelessness and depression were associated with higher suicidal behavior and ideation, but, unexpectedly, depression as measured by the MMPI did not contribute significantly to the multiple regressions. Conclusions: The present study indicated that, although suicidal psychiatric patients have MMPI-2 profiles in the pathological range, they exhibit several differences from nonsuicidal patients. Patients at risk of suicide have specific temperaments as well as personality and defense mechanism profiles. They are more socially introverted, depressed and psychasthenic, and use hysterical and schizoid mechanisms more often. Generalizability of the findings was limited by the small sample size and the mix of bipolar disorder I, bipolar disorder II, major depressive disorder and psychotic disorder patients.

Affective temperaments, as measured by TEMPS-A, among nonviolent suicide attempters.

BACKGROUND The aim of this study was to investigate the role of affective temperaments in suicidal behavior. METHOD Using the standardized Hungarian version of the full-scale 110-item version of the TEMPS-A autoquestionnaire we compared the affective temperament-profiles of 150 consecutively investigated nonviolent suicide attempters (106 females and 44 males) and 302 age, sex and education matched normal controls (216 females and 86 males). RESULTS Compared to controls, both female and male suicide attempters scored significantly higher in the four of the five affective temperaments, containing more or less depressive component (depressive, cyclothymic, irritable and anxious). On the other hand, however, no significant difference between the suicide attempters and controls was found for the hyperthymic temperament. Significantly higher rate of suicide attempters (90.0%) than controls (21.5%) have had some kind of dominant (mean score+2SD or above) affective temperament. Compared to controls, depressive, cyclothymic, irritable and anxious temperaments were significantly more frequent and hyperthymic temperament was nonsignificantly less common among suicide attempters. CONCLUSIONS The findings support the strong relationship between depression and suicidal behavior even on temperamental level, and suggest that hyperthymic temperament does not have predisposing role for suicidal behavior at least in the case of nonviolent suicide attempters. LIMITATION As only nonviolent suicide attempters were studied, our findings should pertain only for this patient-population.

The role of anxious and hyperthymic temperaments in mental disorders: a national epidemiologic study

Temperament has been demonstrated clinically to be linked to mental disorders. We aimed to determine the possible role of temperament in mental disorders in a national epidemiologic study. A nationally representative sample of adults (n=1320) was administered the Lebanese-Arabic version of the Temperament Evaluation of the Memphis, Pisa, Paris and San Diego Autoquestionnaire (TEMPS-A), and the Arabic CIDI 3.0, as part of the LEBANON study. The association among temperaments and DSM-IV mood, anxiety, and impulse control disorders was assessed. The anxious temperament was shown to be a robust predictor of most disorders, especially within the anxiety and depressive clusters. The hyperthymic temperament had a uniquely protective effect on most mental disorders, with the exception of separation anxiety, bipolar, substance abuse and impulse control disorders. These effects were moderated by age and education. Temperaments, previously largely neglected in epidemiologic studies, could play a major role in the origin of mental disorders.

Genome-Wide Association Study of Temperament in Bipolar Disorder Reveals Significant Associations with Three Novel Loci

BACKGROUND The many attempts to identify genes for bipolar disorder (BD) have met with limited success, which has generally been attributed to genetic heterogeneity and small gene effects. However, it is also possible that the categorical phenotypes used in genetic studies of BD are not the most informative or biologically relevant. Although quantitative phenotypes provide an alternative to categorical phenotypes based on diagnosis, they have not been fully exploited in BD genetics due to the lack of accessible biological measures. We have explored aspects of temperament as quantitative phenotypes that might define subtypes of BD with different clinical features and courses of illness. Temperament is a heritable personality factor that establishes the baseline level of reactivity, mood, and energy of a person. METHODS We have performed a genome-wide association study with genotype data from the Bipolar Genome Study and 1263 bipolar subjects that had completed the Temperament Evaluation of Memphis, Pisa, Paris, and San Diego Autoquestionnaire (TEMPS-A). The TEMPS-A is designed to assess lifelong, milder aspects of bipolar symptomatology and defines five temperaments: hyperthymic, dysthymic, cyclothymic, irritable, and anxious. RESULTS The irritable temperament produced the most significant result with a genome-wide significant p value of 1.7 × 10(-8) on chromosome 1. The hyperthymic temperament produced additional genome-wide significant p values of 4.1 × 10(-8) and 2.1 × 10(-8) on chromosomes 12 and 22, respectively. CONCLUSIONS These results suggest that aspects of temperament might define subtypes of BD that are more clinically and genetically homogenous, which might aid in the identification of predisposing genetic variants.

Toward interaction of affective and cognitive contributors to creativity in bipolar disorders: A controlled study

BACKGROUND Enhanced creativity in bipolar disorder patients may be related to affective and cognitive phenomena. METHODS 32 bipolar disorder patients (BP), 21 unipolar major depressive disorder patients (MDD), 22 creative controls (CC), and 42 healthy controls (HC) (all euthymic) completed the Revised Neuroticism Extraversion Openness Personality Inventory (NEO), the Temperament Evaluation of Memphis, Pisa, Paris, and San Diego Autoquestionnaire (TEMPS-A), the Myers-Briggs Type Inventory (MBTI); the Barron-Welsh Art Scale (BWAS), the Adjective Check List Creative Personality Scale, and the Figural and Verbal Torrance Tests of Creative Thinking. Mean scores were compared across groups, and relationships between temperament/personality and creativity were assessed with bivariate correlation and hierarchical multiple linear regression. RESULTS BP and CC (but not MDD) compared to HC had higher BWAS-Total (46% and 42% higher, respectively, p<0.05) and BWAS-Dislike (83% and 93% higher, p<0.02) scores, and higher MBTI-Intuition preference type rates (78% vs. 50% and 96% vs. 50%, p<0.05). BP, MDD, and CC, compared to HC, had increased TEMPS-A-Cyclothymia scores (666%, 451% and 434% higher, respectively, p<0.0001), and NEO-Neuroticism scores (60%, 57% and 51% higher, p<0.0001). NEO-Neuroticism and TEMPS-A Cyclothymia correlated with BWAS-Dislike (and BWAS-Total), while MBTI-Intuition continuous scores and NEO-Openness correlated with BWAS-Like (and BWAS-Total). LIMITATIONS Relatively small sample size. CONCLUSIONS We replicate the role of cyclothymic and related temperaments in creativity, as well as that of intuitive processes. Further studies are needed to clarify relationships between creativity and affective and cognitive processes in bipolar disorder patients.

The relationship of bulimia and anorexia nervosa with bipolar disorder and its temperamental foundations

BACKGROUND Earlier studies have suggested a relationship between bipolar disorder (BP) and eating disorders (ED), more specifically, bulimia nervosa (BN) and bipolar II disorder (BP-II). In the present report we extend this relationship to broader definitions of bipolarity. METHODS Semi-structured interview of 201 patients with DSM-IV criteria for major affective disorders combined with Akiskal and Mallya criteria for Affective temperaments. To diagnose lifetime comorbid eating disorders DSM-IV criteria for eating disorders (Bulimia Nervosa, BN, Anorexia, AN) were used. RESULTS 33 patients had an eating disorder. When compared to patients without ED the patients with ED had a higher prevalence of bipolar disorders. Using strict DSM-IV criteria, this association was only significant for BN (OR) 4.5 (95% CI 1.1-17.6). When using a broader index of bipolarity including patients having affective temperaments, a significant relation was found for BN (OR) 9.1 (95% CI 1.1-73.6), and for patients with a lifetime history of both BN and AN (OR) 8.6 (95% CI 1.1-70.2).We also found patients with ED to have a significantly higher prevalence of affective temperaments, an earlier onset of major affective disorder and to have more depressive episodes. LIMITATIONS Non-blind evaluation of diagnosis for mood, eating disorders and affective temperaments. CONCLUSION In line with previous reports we describe an association between bulimia nervosa and bipolar disorder. Furthermore we report a relationship between lifetime bulimia and anorexia and cyclothymic and related affective temperaments.

TEMPS-A and long-term lithium response: Positive correlation with hyperthymic temperament

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.

Polish validation of the TEMPS-A: the profile of affective temperaments in a college student population.

BACKGROUND AND AIMS The TEMPS-A scale is a self-evaluation measure to assess five affective temperaments: depressive, cyclothymic, hyperthymic, irritable and anxious. The scale has already been validated in over 10 languages. In this paper, the first report on the validation of the Polish version of TEMPS-A is presented. METHODS The TEMPS-A questionnaire version that includes 110 questions has been adapted following the translation-back translation methodology from English to Polish, checked by the originators of the five scales (H.S.A., K.K.A.). In the next step, the Polish version of TEMPS-A was administered to 521 Polish undergraduate students. Internal consistency of temperamental scales was measured with Cronbach-alpha coefficients. Correlation among the temperaments was examined using Pearsons bivariate correlation. Differences between sexes were tested with ANOVA. RESULTS The Cronbach-alpha and the Kuder-Richardson 20 reliability coefficients for the depressive, cyclothymic, hyperthymic, irritable and anxious temperaments were between 0.69 and 0.83. The percentage of subjects whose Z-scores were above 2 SD, was the highest among depressive (4%) and anxious (3.5%) temperaments, followed by the cyclothymic (2.9%), hyperthymic (1%), and irritable (0.6%). The strongest positive correlations between the temperamental scales were found between depressive and anxious, as well as between cyclothymic and irritable ones (correlation coefficients 0.63 and 0.57, respectively). Male subjects attained significantly higher scores for hyperthymic temperament, compared to females, while females scored significantly higher than males on cyclothymic and anxious temperaments. LIMITATIONS Our healthy young subjects are not representative of the Polish population. As external validation has been achieved in other language versions, it was not repeated in the present Polish version. CONCLUSIONS The Polish version of TEMPS-A has a good internal consistency. The findings generally cohere with those from previously validated versions in other languages.

Hyperthymic temperament may protect against suicidal ideation

BACKGROUND The aim of this study was to investigate the role of hyperthymic temperament in suicidal ideation between a sample of patients with affective disorders (unipolar and bipolar). METHOD We investigated affective disorders outpatients (unipolar, bipolar I, II and NOS) treated in eleven participating centres during at least a six-month period. DSM-IV diagnosis was made by psychiatrists experienced in mood disorders, using the corresponding modules of the Mini International Neuropsychiatric Interview (MINI). In addition, bipolar NOS diagnoses were extended by guidelines for bipolar spectrum symptoms as proposed by Akiskal and Pinto in 1999. Thereby we also identified NOS III (switch by antidepressants) and NOS IV (hyperthymic temperament) bipolar subtypes. All patients completed the Beck Depression Inventory (BDI). We screened a total sample of 411 patients (69% bipolar), 352 completed all the clinical scales without missing any item. RESULTS No statistical significant difference in suicidal ideation (measure by BDI item 9 responses) was found between bipolar and unipolar patients (4.5% vs. 9.1%, respectively). On the group of bipolar patients, suicidal ideation was slightly more frequent among bipolar NOS compared with bipolar I and II (p value 0.094 and 0.086, respectively), interestingly we found a statistical significant less common suicidal ideation among bipolar subtype IV (with hyperthymic temperament) compared with bipolar NOS patients (p value 0.048). CONCLUSIONS Our results indicate that those subjects with hyperthymic temperament displayed less suicidal ideation. This finding supports the hypothesis that this particular affective temperament could be a protective factor against suicide among affective patients. LIMITATION The original objective of the national study was the cross validation between MDQ and BSDS in patients with affective disorders in our country. This report arises from a secondary analysis of the original data.