Ocd is more common than was once thought. In fact, it is the fourth most common mental disorder after depression, alcohol and substance abuse, and social phobia. This frequency is much the same all over the world, although the form of OCD may differ from one culture to another. This is because the content of an obsession is usually what a person does not want to think, or a kind of harm they particularly want to prevent. We are all influenced by current trends in what we see as important. For example, religious obsessions used to be very common but are now less frequent in western cultures.
By contrast, contemporary concerns with the health and social problems, such as AIDS and child abuse, are increasingly reflected in the obsessions described by individuals with OCD. However, while the content of obsessions and compulsions vary across individuals, cultures, and periods, the form remains the same.
OCD is generally equally common in men and women, although there are some interesting differences in the symptoms. For example, more women than men have aggresive obsessions and compulsions to do with washing, while men are more likely to have obsessions about numbers, symmetry, or exactness, or sexual obsessions, or to suffer from obsessional slowness. Women are especially at risk during pregnancy and in the postnatal period, probably because of the increased sense of resonsibility. Young children with OCD are twice as likely to be boys as to be girls.
http://www.toolsforocd.com/