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Month: December 2015

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Measuring How Well A Test Works, or How To Find a Hipster

By Howard Herrell, MDPosted on December 21, 2015December 21, 2015

Imagine we design a test to detect a disease. In the graph below are 500 patients. Some patients have a positive test result and also have […]

Measuring How Well A Test Works, or How To Find a Hipster Read More

Prenatal Antidepressants and Autism? Mi dispiace!

By Howard Herrell, MDPosted on December 18, 2015

A new study has been published in the Dec. 14, 2015 issue of JAMA: Pediatrics, which claims a link between prenatal use of antidepressants, particularly in […]

Prenatal Antidepressants and Autism? Mi dispiace! Read More

Primer: How To Systematically Read A Scientific Paper

By Howard Herrell, MDPosted on December 17, 2015December 17, 2015

The ability to read scientific literature critically is one of the foundational skills of physicians. The most common way (and perhaps the most wrong way) that […]

Primer: How To Systematically Read A Scientific Paper Read More

How Do I Diagnose Ruptured Membranes? Bayesian Statistics at its Best

By Howard Herrell, MDPosted on December 15, 2015January 5, 2016

The diagnosis of ruptured membranes in pregnancy is clinically very important. Decisions about delivering a pregnancy, hospitalization, and even termination of pregnancies, often depend on […]

How Do I Diagnose Ruptured Membranes? Bayesian Statistics at its Best Read More

Odds Ratios Versus Relative Risk

By Howard Herrell, MDPosted on December 14, 2015

Many great things have been written about the difference between Odds Ratios (OR) and Relative Risks (RR). Every medical student at some point has been taught […]

Odds Ratios Versus Relative Risk Read More

Do The NHS Birth Recommendations Have Meaning for The US? Or, The Safety of Home Birth

By Howard Herrell, MDPosted on December 12, 2015December 13, 2015

Recently, The Guardian reported, in an article entitled Low-risk women urged to avoid hospital birth, on the British National Health Service (NHS) urging low-risk pregnant women […]

Do The NHS Birth Recommendations Have Meaning for The US? Or, The Safety of Home Birth Read More

Power Laws, Decision Making, and Anxiety

By Howard Herrell, MDPosted on December 12, 2015December 12, 2015

Power laws are mathematical relationships used in statistics to describe how a change in one variable affects another variable. A basic power law is illustrated […]

Power Laws, Decision Making, and Anxiety Read More

How Should I Do A Cesarean Delivery?

By Howard Herrell, MDPosted on December 10, 2015December 12, 2015

There are billions of ways to do a cesarean delivery. At least 203,843,174,400 ways that I know of (well that’s how many we are going […]

How Should I Do A Cesarean Delivery? Read More

What Should Be Done At The Yearly Visit?

By Howard Herrell, MDPosted on December 10, 2015December 10, 2015

The annual Well-Woman Visit is in need of re-invigoration and redefinition. Unfortunately, in many physicians’ practices and in the minds of many millions of patients, the […]

What Should Be Done At The Yearly Visit? Read More

The Illusion of Causality

By Howard Herrell, MDPosted on December 9, 2015

Humans seek to explain and understand. We want answers and explanations. Our brains demand it. But our brains have developed many short-cuts to understanding and […]

The Illusion of Causality Read More

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