People who attend church tend to have lower blood pressure, to exercise more, to eat healthier and to have lower rates of suicide and drug and alcohol abuse. This suggests religion and religious attendance have positive impacts on people's lives.

Researchers, however, are becoming more interested in the role of spirituality.

According to integrative psychiatrist Lynn Klimo spirituality has to do with the more personal relationship between oneself and one's belief system.

"It is how they actually believe something, and what they give meaning to," she said. This is a more difficult area to study.