For example, having ceramic tile installed on a cement floor will likely cost more than having the same tiles installed in a kitchen sitting on a wood foundational surface. The latter example requires fewer materials and less time to complete the installation.
A lot of things can cause stress. You may feel stress when you go on a job interview, take a test, or run a race. These kinds of short-term stress are normal. Long-term (chronic) stress is caused by stressful situations or events that last over a long period of time, like problems at work or conflicts in your family. Over time, chronic stress can lead to severe health problems.
However, those that are experiencing severe stress may be more prone to that first attack, especially. It's not clear how stress causes panic attacks, but it likely has something to do with the negative thinking associated with those under tension. Stress may also increase the likelihood of follow up attacks, although much of that stress may be caused by concern over the attacks themselves.