This graph shows a comparison of the health of a group of experienced mental silence (Sahaja Yoga) meditators and three other groups including a group of Presbyterian clergy from America, a group of non-mental silence meditators, and the general Australian population. Health was measured using the Short Form 36 survey. The mental silence meditators’ health profile is generally better then the other groups. These results demonstrate an association between the mental silence experience and positive health.
From 
Manocha R and German E. Meditation, Health and Quality of Life: A Census of a Meditating Population.