Tag Archives: bias

Tylenol, antibiotics and asthma risk: Confounding by indication case study 3

About Tara Haelle

Tara Haelle (@TaraHaelle) is AHCJ's medical studies core topic leader, guiding journalists through the jargon-filled shorthand of science and research and enabling them to translate the evidence into accurate information.

Photo: Pewari via Flickr

I’ve discussed in previous blog posts ways in which confounding by indication can completely change the way observational research is interpreted: it can flip common wisdom about labor induction and cesarean delivery risk on its head, and it can lead to bizarre conversations illustrating a researchers’ blind spots when it comes to discussing topics such as depression and hormonal birth control. Continue reading

Confounding by indication case study 2: Hormonal contraception and risk of depression

About Tara Haelle

Tara Haelle (@TaraHaelle) is AHCJ's medical studies core topic leader, guiding journalists through the jargon-filled shorthand of science and research and enabling them to translate the evidence into accurate information.

Photo: Jess Hamilton via Flickr

I wrote in a previous blog about the importance of understanding confounding by indication and being sure to ask researchers about it when covering observational studies that appear to suggest a particular treatment or intervention might contribute to a specific effect. I’m passionate about this type of study bias because not considering it — which happens a LOT — can lead people to decline otherwise helpful treatments or leave them experiencing more harm and pain because of unfounded fears. Continue reading

New data resource on NSQIP database can inform coverage of relevant medical studies

About Tara Haelle

Tara Haelle (@TaraHaelle) is AHCJ's medical studies core topic leader, guiding journalists through the jargon-filled shorthand of science and research and enabling them to translate the evidence into accurate information.

More than 1,500 peer-reviewed studies have relied on a surgical database known as the National Surgical Quality Improvement Program (NSQIP), or its pediatric counterpart, the NSQIP-P.

These databases, set up by the American College of Surgeons, offer extraordinarily granular information about clinical variables and outcomes (as well as demographic information) for a wide range of surgical procedures. Continue reading

Covering vascular surgery? Watch for selection bias in this database

About Tara Haelle

Tara Haelle (@TaraHaelle) is AHCJ's medical studies core topic leader, guiding journalists through the jargon-filled shorthand of science and research and enabling them to translate the evidence into accurate information.

If you cover medical research related to vascular procedures and conditions, you’ve likely come across studies using data from the Society for Vascular Surgery Vascular Quality Initiative (SVS VQI).

As a database designed to improve patient safety, the SVS VQI can be very useful for analyzing outcomes and associated variable for 12 major vascular procedures as long as researchers (and journalists) are aware of the limitations of the data set. Continue reading

New tip sheet expands on HealthNewsReview.org criteria

About Tara Haelle

Tara Haelle (@TaraHaelle) is AHCJ's medical studies core topic leader, guiding journalists through the jargon-filled shorthand of science and research and enabling them to translate the evidence into accurate information.

The first AHCJ conference I ever attended was in 2011 in Philadelphia. I had only recently learned about the organization and knew very little about it. I’d signed up for a field trip, but I had brought my 8-month-old with me and was up late the night before, so overslept and missed it.

When I actually got to the conference (my aunt watched my son), I caught the second half of a Thursday workshop with Ivan Oransky, M.D., (now AHCJ’s president) and Gary Schwitzer of HealthNewsReview.org on how to understand and responsibly report on medical studies. It was the session I would eventually end up leading myself years later. Continue reading