Mood Disorder Questionnaire [MDQ-13]

Description and Purpose

The Mood Disorder Questionnaire (MDQ-13) is a self-report instrument used to assess the likelihood of the presence of bipolar disorder. It consists of a series of questions exploring mood-related symptoms as well as characteristics associated with episodes of mania or hypomania.

The primary purpose of the MDQ is to identify individuals who may present symptoms consistent with bipolar disorder and who may therefore require further clinical evaluation. The questionnaire can serve as a useful initial screening instrument, although its results should be interpreted within a broader clinical assessment rather than used as a stand-alone diagnostic conclusion.

Structure of the Questionnaire

The MDQ-13 includes 13 core symptom questions designed to investigate experiences and behaviors potentially associated with periods of altered or elevated mood.

Through these questions, the instrument provides information regarding the presence of mood-related symptoms and their potential relevance to manic or hypomanic episodes.

The questionnaire therefore provides a structured approach to the initial identification of patterns that may warrant more detailed assessment.

Scoring and Interpretation

Participants respond to the questions concerning the presence of specific mood-related experiences or symptoms. Their responses are subsequently scored to estimate the likelihood that the observed pattern may be associated with bipolar disorder.

According to the source document, MDQ scores are intended to indicate the possibility of bipolar disorder, rather than provide an independent diagnosis.

Interpretation should therefore take into account the individual’s broader clinical presentation and, where appropriate, be complemented by a comprehensive assessment conducted by a suitably qualified healthcare professional.

Data Analysis and Use

Data collected through the MDQ can be analyzed using both descriptive and comparative statistical procedures.

Descriptive statistics may be used to summarize participants’ responses and the distribution of scores within a sample. Comparative analyses can also be conducted to investigate differences in MDQ results between different populations or participant groups.

In research settings, the results may additionally be examined in relation to other psychological, psychiatric, demographic, or social variables included in the study design.

The source document also describes comparison with other diagnostic scales as an approach to examining the validity and reliability of the questionnaire.

Psychometric Evaluation

The psychometric evaluation of the MDQ involves examining its reliability and validity across different populations and settings.

According to the source material, adaptation and calibration procedures may include administration of the questionnaire to different cultural and social populations, assessment of internal consistency using Cronbach’s alpha, and validity testing to examine the instrument’s ability to identify the presence of bipolar symptoms.

These procedures are important because the performance of a screening questionnaire may vary according to the characteristics of the population in which it is administered.

Applications

The MDQ can be used in clinical and research contexts to support the initial identification of individuals who may present symptoms associated with bipolar disorder.

In research, it can contribute to the investigation of mood-related symptoms across different populations and facilitate comparisons between demographic, clinical, or other relevant groups.

Its results may also be examined alongside other psychological or psychiatric measures to provide a broader understanding of participants’ characteristics.

The questionnaire is most appropriately considered a screening instrument. A positive screening result indicates the potential need for further assessment rather than establishing a diagnosis by itself.

Conclusion

The Mood Disorder Questionnaire [MDQ-13] provides a structured self-report approach to assessing symptoms potentially associated with bipolar disorder, particularly manifestations related to mania or hypomania.

Its main value lies in supporting the initial identification of individuals who may require further evaluation. The results should therefore be interpreted alongside other relevant clinical information and should not be considered a substitute for a comprehensive diagnostic assessment.

References

Hirschfeld, R. M. A., et al. (2000). Mood Disorder Questionnaire: A new screening instrument for bipolar disorder. American Journal of Psychiatry, 157(11), 1873–1875.

American Psychiatric Association. (2013). Diagnostic and statistical manual of mental disorders (5th ed.). American Psychiatric Publishing.

Miklowitz, D. J. (2007). Bipolar disorder: A family-focused treatment approach. Guilford Press.