Harvard research points out lack of studies proving effectiveness of digital health solutions

Harvard Medical School identified the twenty top-funded private U.S.-based digital health companies to analyze their products and services, related peer-reviewed evidence and the potential for impact on patients with high-burden conditions. The researchers found digital health companies typically used healthy volunteers in their studies. Few studies enrolled high-burden populations or measured their impact in terms of outcomes, cost or access to care. The researchers suggest that leading digital health companies haven't yet demonstrated substantial impact on disease burden or cost in the U.S. health care system. 
Related:
Do digital tools fail to show impact in high-risk, high-cost populations? - Modern Healthcare (sub. req.)
Billions of dollars are pouring into digital health, but Americans are still getting sicker and dying younger - CNBC