This white paper from Withings aims to show how their devices can help with ongoing, chronic health conditions. While it is prudent to be cautious with white paper data from vendors, this paper is clear, transparent, and has three physicians associated with it (including Eric Topol). The results are compelling and show that wearables may indeed be the theme for 2015.
Measurement correlates with weight decrease
Weight decrease correlates with blood pressure improvement
Physical activity up 80% with pedometer usage
Increased activity correlates with weight improvement
So, while correlation does not equal causation, it is a prerequisite and points the way for how mHealth activities can help patients with chronic conditions improve over time.
Source: Withings White Paper