Howard Hughes Obsessive Compulsive Disorder

Leonardo DiCaprio impersonates Howard Hughes in the film The Aviator. He shows considerable obsessions with control over his food, environment, etc.

Not only does his own appearance bother him, but he also is disturbed by others around him who are slightly unkempt. What obsessive compulsive symptoms did Howard Hughes exhibit in this clip? What are the DSM-IV criteria for OCD?