JAN 16, 2016 5:37 AM PST

The Link Between Potatoes And Gestational Diabetes

WRITTEN BY: Xuan Pham
A new study by the National Institute of Health reported that a potato-rich diet pre-pregnancy may significantly increase a woman’s risk for gestational diabetes. Indeed this result sounds grim, especially for all the tuber-loving women out there. But does this mean that potatoes are off the menu for pre-pregnant women? Not necessarily. 
 
How strong is the link between potatoes and gestational diabetes?

In this research, the authors sought to answer whether there was a link between potato consumption before pregnancy and the risk of developing gestational diabetes. The condition is also known as pregnancy-induced diabetes, and affects as much as 9% of all pregnancies.
 
Researchers collected self-reported data from 15,632 women who were part of the Nurses’ Health Study II and who became pregnant over a 10-year period (1991-2001). These women had no history of gestational diabetes or other chronic health conditions. Every four years, the women filled out self-reported questionnaires of food consumptions. Any reported diagnoses of gestational diabetes were then validated with medical records.
 
During the 10-year follow-up, the researchers found 854 cases of gestational diabetes occurred in the total 21,693 single-birth pregnancies. After adjusting for age, family history, overall diet, BMI, and other risk factors, researchers still see a link between potato consumption and risk for gestational diabetes.
 
The study further outlined that consuming 2-4 servings of potatoes per week pre-pregnancy increased the risk of gestational diabetes by 27%. This risk increases to 50% when potato consumption exceeds 5 cup serving of potatoes per week.
 
But before we lambaste potatoes completely, it’s important to note the limitations of the study and why the results aren't as extreme as it sounds.
 
The biggest limitation here is that all the data that were used to draw conclusions for this study were based on self-reported assessments. There are many ways in which a questionnaire can bias how a participant responds. And this study’s questionnaire had an inherent bias towards potato consumption, possibly swaying the participants’ answers.
 
Even when questionnaires are perfectly designed to be completely unbiased, the participants’ responses are subject to recall biases. These are errors in retrieving past memories, and can dramatically skew data results. It is not unlikely that participants in this study suffered from recall bias, as the questionnaires were answered at four-year intervals.
 
And finally, even if researchers were able to adjust for all the biases inherent in this type of study design, the study does not prove a cause-and-effect relationship between potatoes and gestational diabetes. In their own words, the authors say that “a causal association cannot be assumed.”
 
 So, pre-pregnant women don’t have to forgo potatoes entirely. But they also shouldn’t consume the tubers without limits either.
 
Potatoes have a higher glycemic index than other vegetables, thus can trigger sharp rises in blood sugar levels. Ultimately, pregnant or not, moderation is probably best when it comes to these delicious starchy treats.

 

Additional source: Medline Plus
 
About the Author
  • I am a human geneticist, passionate about telling stories to make science more engaging and approachable. Find more of my writing at the Hopkins BioMedical Odyssey blog and at TheGeneTwist.com.
You May Also Like
DEC 09, 2019
Clinical & Molecular DX
DEC 09, 2019
Astronauts help to advanced personalized medicine
Extreme temperatures and lethal levels of radiation are just some of the hazards faced by astronauts as they traverse th ...
DEC 23, 2019
Clinical & Molecular DX
DEC 23, 2019
Long awaited at-home test gives hemophiliacs peace of mind
Haemophilia is a genetically-inherited condition that severely affects an individual’s ability to stop bleeding. B ...
MAR 29, 2020
Genetics & Genomics
MAR 29, 2020
Biomarkers That Predict Crohn's Disease Are Identified
A series of studies published in Gastroenterology has outlined new approaches in predicting IBD.
APR 11, 2020
Clinical & Molecular DX
APR 11, 2020
The "Smart Toilet": Getting to the Bottom of Precision Health
Your toilet could soon play a big part in keeping you healthy, thanks to a new “smart toilet” technology dev ...
APR 14, 2020
Clinical & Molecular DX
APR 14, 2020
Urchin-shaped DNA Biosensor Detects Disease Earlier
For researchers at the Missouri University of Science and Technology developing a new class of nanodiagnostics, good thi ...
APR 21, 2020
Immunology
APR 21, 2020
Sino Biological Focuses on Serological Studies of COVID-19
April 17, 2020, Sino Biological announced this week that the company launched the world’s first coronavirus antige ...
Loading Comments...