Four out of five persons that use self-measurements for health, have adjusted their behavior because of what they learnt from this self-tracking . This was shown in a survey performed by research group Motivaction and the Quantified Self Institute of the Hanze University of Applied Sciences Groningen.
The study was performed in a representative sample of 1045 Dutch persons aged between 15 and 70 years. More than half of the respondents indicated to use self-tracking for health aspects. Two out of five self-track body weight, 1 out of five self-track diet and physical activity and a much smaller group self-tracks sleep, stress and / or emotions.
Publication in Dutch on http://www.skipr.nl/actueel/id13456-zelfmeting-zorgt-voor-gezonder-gedrag.html