
Diagnostic tests such as CAT scans are not perfect. A test can make two errors. It can call a diseased person healthy – a false negative. This is like acquitting a person guilty of a crime. Or a test can falsely call a healthy person diseased – a false positive. This is like convicting an innocent person of a crime that she did not commit. There is a trade-off between false negatives and false positives. To achieve fewer false negatives we incur more false positives.
Physicians do not want to be wrong. Since error is possible we must choose which side to err towards. That is we must choose between two wrongness. We have chosen to reduce false negatives at the expense of false positives. Why this is so is illustrated by screening mammography for breast cancer.
A woman who has cancer which the mammogram picks up is thankful to her physician for picking up the cancer and, plausibly, saving her life.
A woman who does not have cancer and whose mammogram is normal is also thankful to her physician. The doctor does not deserve to be thanked as she played no hand in the absence of the patient’s cancer. But instead of thanking genes or the cosmic lottery, the patient thanks the doctor.
In 2011 and 2012 I wrote about the increasing problem of 
Physicians well know the rapid advance of information technology in medicine over the last decade. Pushed by federal and state regulations and requirements, the adoption of electronic medical records has been swift. Today, some 90 percent of physicians in Massachusetts use some form of electronic medical records.
At Health Datapalooza, we heard plenty about the importance of addressing the myriad information needs health care consumers have – when choosing plans and providers, receiving care, or trying to become more engaged in their own health. Therefore it seems fitting to follow the ‘palooza with an update on this year’s RWJF challenge program and introduce the next for 2017.
With healthcare mergers now announced seemingly every week, I’ve been giving some thought to scale: How big can/ should health systems be?
Hospital administrators are finding that true continuous quality improvement (CQI) requires a radical change in thinking.