Ggplot2, PubMed citation frequency and DSM-IV Axis I disorders by year
I an earlier post I used
ggplot2 to plot publication count by
year for different psychotherapy orientations. I’m using an updated
version of that R-code in this post to plot publication count for
several major DSM-IV disorders. It’s basically like a very simple
I searched for the following disorders: Depression, Bipolar disorder, Post-Traumatic Stress Disorder (PTSD), Attention-Deficit/Hyperactivity Disorder (ADHD), Obsessive-Compulsive Disorder (OCD), Anorexia nervosa, Bulimia nervosa, Social phobia, Panic disorder, Generalized anxiety disorder (GAD), Borderline personality disorder, Agoraphobia and Specific phobia. The following PubMed queries were used:
PubMed Search String
- Depression[Title/Abstract] (186815 hits)
- Bipolar disorder[Title/Abstract] (12341 hits)
- Post-Traumatic Stress Disorder[Title/Abstract] (4294 hits)
- Attention-Deficit/Hyperactivity Disorder[Title/Abstract] (5121 hits)
- Obsessive-Compulsive Disorder[Title/Abstract] (7172 hits)
- Anorexia nervosa[Title/Abstract] (8634 hits)
- Bulimia nervosa[Title/Abstract] (3547 hits)
- “Social phobia” OR “social anxiety disorder”[Title/Abstract] (3418 hits)
- “Panic disorder” OR “panic attack”[Title/Abstract] (8542 hits)
- Generalized anxiety disorder[Title/Abstract] (2965 hits)
- Borderline personality disorder[Title/Abstract] (3116 hits)
- Agoraphobia[Title/Abstract] (2352 hits)
- Specific phobia[Title/Abstract] (424 hits)
Figure 1. ggplot with DSM-IV Axis 1 disorders PubMed publication count by year.
Depression removed and plot zoomed in.
Figure 1. ggplot with DSM-IV Axis 1 disorders PubMed publication count by year (depression removed).
The word depression is really mentioned much much more often than the other disorders in articles title/abstracts. Among the other disorders there seem to be that some disorders have become more popular in the last decade. Bipolar disorder, PTSD, ADHD and OCD seem to have gotten some extra attention compared to the remaining disorders. Especially bipolar disorder appear to really have become the “it” diagnosis in the last decade. From what I’ve heard from psychologists and psychiatrists working in the swedish psychiatry there seem to be some validity to this conclusion.
I made some changes to the R code since.
Since I’m importing and reading publication year from individual data
files for each disorder, I changed the code to bind each new disorder to
the previous one, generating one variable in
long format. It would
have made a lot of redundant code to plot each disorder on it’s own
ggplot2-layer. I also updated the
scrape.pubmed()-function to now
accept two arguments, where I specified disorder and disorder type (like
mood disorder or anxiety disorder). Another change is that I’m now using
direct.label() to remove the legend from
ggplot and add labels
direct to the plot.
Published March 31, 2012 (View on GitHub)