**4. Conclusions**

There are growing studies on quality-of-life interventions. And the studies conducted on the effectiveness of quality-of-life interventions in European and American countries were on large scale, and they included different samples of normal individuals who suffer from physical, mental, and psychological diseases. In the Arab countries, studies of quality-of-life interventions were less comprehensive for specific types of individuals, especially patients. In general, most of these studies used the experimental and quasiexperimental quantitative methodology. However, we still need to use the mixed research methodology further to expand the study of the interventions' effectiveness.
