According to a recent survey of health executives,

...73% of respondents said they have seen positive return on investment in new technologies such as wearables that track fitness and vital signs, and other data generated by individual patients.

Source: "Healthcare Industry Must Focus on Training Machines Over the Next Three Years, Accenture Reports," Accenture News Release, June 22, 2015, https://newsroom.accenture.com/news/healthcare-industry-must-focus-on-training-machines-over-the-next-three-years-accenture-reports.htm