When we look at recent research, some patterns are fairly consistent: more girls and women have OCD compared to boys and men (in teenage and adult groups), men tend to develop symptoms at a younger age or have their worst symptoms younger, adult women are more likely to have contamination fears and worry about causing harm, and adult men are more likely to have disturbing religious or sexual thoughts. Men and women seem equally likely to respond well to treatment and to have additional mental health conditions, though the specific types of additional conditions might differ by gender. However, some studies have found no gender differences at all in how common OCD is, when it starts, or what symptoms people have.