Bibliographic record
Abstract
Dear Editor: The review paper by Dr Patten and Dr Paris1 in the November 2008 issue of The CJP is a very important one. On one hand, a growing number of researchers have been diagnosing bipolar disorders (BDs) (bipolar spectrum) more and more, and, on the other hand, a group of researchers remark that many disorders of the bipolar spectrum lack diagnostic validation. This upward trend of bipolar diagnoses, mainly bipolar II disorder (BD-II), has reached a figure of around 50%, compared with major depressive disorder (MDD), in outpatient clinical settings. The broad boundaries of the bipolar spectrum are mainly related to: 1. better probing for hypomania (thus BD-II), overcoming the misdiagnoses of structured interviews by using semi-structured interviews carried out by clinicians, which assess all past hypomanic symptoms, especially overactivity, and bypass the stem, and skip out the question on mood change of the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition (DSM-IY) Structured Clinical Interview for DSM-IV (SCID), a cause of missed BD-II diagnoses; 2. shorter, validated minimum duration of hypomania (1 to 3 days), as the 4-day DSM-IV minimum duration is only consensus-based; 3. inclusion of MDD with bipolar features not otherwise specified, such as bipolar family history, young age-at-onset, many recurrences, mixed depression (that is, the cooccurrence of depression and subthreshold hypomania); and 4. while SCID focuses mainly on the impairment (nonmarked) for diagnosing hypomania; most hypomania have superior functioning (reviewed by Benazzi2). The same DSM-IV-TR reports in the text that hypomania may have increase in efficiency, accomplishments, or creativity, compared with the usual behaviour, or some functional impairment. Hecker3 reported that most outpatient hypomanias have superior functioning, while Kraepelin,4 studying inpatients, reported more on the impairment of hypomania. So, a syndrome that does not meet DSM-IV criteria for a disorder (that is, distress and impairment) should still be considered a disorder? By itself, hypomania is often a pleasant period of improved functioning. However, BD-H is mainly a depressive disorder,2 and hypomania occupies a minority of the period of illness.2 Compared with MDD, BD-II is more severe (for example, more recurrences, comorbidity, suicidality, and unstable course), which makes detection of hypomania important for treatment and outcome (clinical validity).2 Beyond BD-II, MDD with bipolar features has been included in the bipolar spectrum. Its clinical utility (and need to detection) has been preliminary shown by finding that in bipolar mixed depression (mixed depression is not uncommon in MDD, too) the concurrent subsyndromal hypomanic symptoms can be worsened by antidepressants (lower response rate, more switching rate).2,5 1 fully share the view by Dr Patten and Dr Paris that the best test of the bipolar spectrum is its clinical validity. Up to now, many bipolar spectrum disorders have yet to show clear evidence of clinical validity (apart from BD-II). I would support research in this area, more to assess clinical utility than diagnostic validity (given the unknown biological underpinnings of BDs, the current validators are only a questioned proxy of validation). References 1. Patten SB, Paris J. The bipolar spectrum - a bridge too far? Can J Psychiatry. 2008;53(1 1):762-768. 2. Benazzi F. Bipolar disorder - focus on bipolar II disorder and mixed depression. Lancet. 2007;369:935-945. 3. Koukopoulos A. Ewald Hecker' s description of cyclothymia as a cyclical mood disorder: its relevance to the modern concept of bipolar II. J Affect Disord. 2003;73:199-205. 4. Kraepelin E. …
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.005 | 0.025 |
| Meta-epidemiology (narrow) | 0.002 | 0.001 |
| Meta-epidemiology (broad) | 0.003 | 0.001 |
| Bibliometrics | 0.002 | 0.002 |
| Science and technology studies | 0.001 | 0.002 |
| Scholarly communication | 0.004 | 0.007 |
| Open science | 0.004 | 0.001 |
| Research integrity | 0.010 | 0.013 |
| Insufficient payload (model declined to judge) | 0.007 | 0.006 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".