For those who have lung cancer, a new piece of research suggests that quality of life is single largest predictor of survival. Not drugs, not food -- but quality of life (which can be hard to quantify).

Instead of data like tumor size, development stage or other medical concerns, the actual quality of a cancer patient's life is is utmost concern according to the research. This is very interesting and flies in the face of strictly empirical data concerning cancer patient longevity.

What qualifies as higher "quality of life," you may ask? Being married of having a partner in life was among the highest.