What's the difference between a panic attack and a panic disorder then?

Panic attacks are part of panic disorder - if you have more than one panic attack, and they are accompanied by at least four of the abovementioned symptoms.

Is panic disorder more common in men or in women?

Panic disorders are two times as common in women as men. It's especially common in people who are in their 20s. The first attack can sometimes be triggered by a particularly stressful event in the person's life, such as losing a loved one, or a divorce, or exams, or losing a job.

Panic disorders seems to be inherited as well. It's not such a good disorder to have because 50% of all patients are prone to depression, and also drug or alcohol abuse.