JAN 16, 2016 05:37 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
APR 25, 2018
Cancer
APR 25, 2018
Artificial Mole Tattoo for Early Cancer Detection
Researchers are looking to biotechnology to enhance the detection of diseases including cancer. A group utilized the consistent presence of long-term hypercalcemia to detect early cancer....
MAY 09, 2018
Clinical & Molecular DX
MAY 09, 2018
New "MRI Glove" for Bone and Joint Visualization
The newest in MRI technology literally fits like a glove. NYU School of Medicine scientists have designed an MRI glove that, for the first time, captures c...
JUN 08, 2018
Clinical & Molecular DX
JUN 08, 2018
Early Detection of Tooth Decay from Bacterial Invasion
We all get cavities, but have we ever thought much about the biology of the process? From the Akson Russian Science Communication Association, scientists i...
JUL 20, 2018
Chemistry & Physics
JUL 20, 2018
X-ray Images to Get Colors
In the near future, the X-ray images from your doctor's office will no longer be just black and white, at least that's what MARS Bioimaging Ltd, an...
SEP 17, 2018
Microbiology
SEP 17, 2018
Detecting Dangerous Latent Viruses
Evidence mounts that viruses play a role in disease development....
SEP 24, 2018
Genetics & Genomics
SEP 24, 2018
Towards a Blood Test for Drowsy Driving
Driving is an everyday activity for many people around the world, and it comes with serious risks....
Loading Comments...