What’s the stat again? Something like only 20% of all things doctors do have good evidence to support their efficacy. What’s the stat again? Something like only 20% of all things doctors do have good evidence to support their efficacy. Share this:Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Facebook (Opens in new window)Click to email a link to a friend (Opens in new window)