One way of looking at depression is that it is the result of avoidance behavior. Most people with anxiety tend to chronically avoid certain situations since they often trigger anxiety. So some form of exposure therapy can be helpful. In the case of depression, the emphasis is often on just being more active as in behavioral activation.
BTW, regarding "pure O," ruminating can be just as compulsive a behavior as handwashing, if not more so. So with OCD, there are usually other compulsions as well, though they may not feel distressing since, like all compulsions, they are used to relieve or prevent anxiety.
---------- Post added at 05:58 PM ---------- Previous post was at 01:22 PM ----------
Regarding depression as secondary to OCD:
BTW, regarding "pure O," ruminating can be just as compulsive a behavior as handwashing, if not more so. So with OCD, there are usually other compulsions as well, though they may not feel distressing since, like all compulsions, they are used to relieve or prevent anxiety.
---------- Post added at 05:58 PM ---------- Previous post was at 01:22 PM ----------
Regarding depression as secondary to OCD:
OCD patients display low QoL [quality of life] that in some studies matches or even falls below scores obtained from chronic and disabling conditions such as schizophrenia. QoL is most consistently associated with depression, a disorder which is present in ~50% of these patients. To a lesser degree, QoL correlates with obsessions, and in some studies also with compulsions. Our Internet survey shows that patients have multiple social and work-related problems associated with OCD. While our study mainly involved adults, similar problems have been reported among children and adolescents.
Reasons for low QoL are multidimensional and may largely vary across subjects. Initiation of treatment is often started at a point in time where the illness has progressed and important resilience factors and resources (eg, social support and employment) have already been compromised.
http://www.uke.eu/kliniken/psychiat...psychotherapie/cns_spectrums_Suppl_Moritz.pdf