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Principal components of mania.
A González-Pinto1, J Ballesteros, A Aldama
1Santiago Apóstol Hospital, C/Olaguibel, 29, 01004 Vitoria, Spain. agonzalez@hsan.osakidetza.net
Journal of Affective Disorders
|August 29, 2003
Summary
This study found mania comprises three core dimensions: hedonism, dysphoria, and activation. It also frequently includes psychotic and depressive factors, suggesting distinct states within mania.
Area of Science:
- Psychiatry
- Mental Health Research
- Affective Disorders
Background:
- Traditional categorical classifications of psychiatric diseases are being challenged by dimensional approaches.
- Research on the dimensional structure of mania is limited, with ongoing debate regarding a depressive dimension.
Purpose of the Study:
- To investigate the dimensional structure of manic disorder.
- To utilize established scales for assessing affective disorder symptoms in mania.
Main Methods:
- 103 inpatients meeting DSM-IV criteria for bipolar disorder (manic or mixed) were assessed.
- The Young Mania Rating Scale (YMRS) and Hamilton Depression Rating Scale (HDRS-21) were administered.
- Principal components factor analysis was performed on the YMRS and HDRS-21 data.
Main Results:
- Factor analysis identified five independent factors: depression, dysphoria, hedonism, psychosis, and activation.
- Depressive factor scores exhibited a bimodal distribution, suggesting two distinct states.
- Dysphoria, hedonism, and activation factors had unimodal distributions; psychosis factor was not normally distributed.
Conclusions:
- Mania appears to consist of three primary dimensions: hedonism, dysphoria, and activation.
- Psychotic and depressive factors are common comorbidities in manic episodes.
- The presence and bimodal distribution of a depressive factor underscore the importance of assessing depression during manic states, supporting the existence of different manic states.