Measuring safety is crucial to improving health care, yet we still struggle to do it well. Much of the challenge lies in safety's very nature: it is, inherently, a non-event—the absence of harm. So by necessity we focus instead on measuring what might be called "non-safety," usually in the form of harmful events. Fewer of these harmful events, we assume, means a safer health care system. But which events do we count? How do you tally non-safety? Our answer to that simple question is hugely cons ... read full post