Summary: Researchers found that the pandemic doubled the incidence of clinical depression among first-year college students, affecting one-third of the cohort. Even students with genetic resilience factors were not spared, especially young women.
The study utilized an Affect Score tool combining mental health questionnaires and genetic risk prediction, offering potential for early depression prediction and prevention. This research is vital in understanding the long-term mental health implications of the pandemic on young adults and developing targeted support strategies.
Key Facts:
Source: University of Michigan
Living through a historic pandemic while handling the stress of the first year of college sent one-third of students in a new study into clinical depression. Thats double the percentage seen in previous years of the same study.
And while certain genetic factors appeared to shield first-year students in pre-pandemic years from depression, even students with these protective factors found themselves developing symptoms in the pandemic years.
In fact, much of the overall rise in student depression during the pandemic was among young women with this kind of genetic resilience.
But the research has a silver lining.
By studying these students experiences and backgrounds in depth and over time, scientists may have discovered a way to go beyond genetics to predict which students might be more or less vulnerable to stress-related depression.
The new studyis published in theProceedings of the National Academy of Sciencesby a team from theMichigan Neuroscience Instituteat the University of Michigan.
Potential for prediction and prevention
The team used their findings to develop a tool called an Affect Score, that combines answers from a range of standard mental health questionnaires. The score could help colleges and universities offer more social and mental health support to those most at risk.
The score might work in other groups of people, too, alone or in combination with genetic risk prediction for depression. But further research is needed.
The new findings come from a multi-year longitudinal effort to study the mental health, genetics, personal history, physical activity and sleep of successive groups of first-year college students. It began several years before the pandemic and continues today.
These students experiences during such a stressful time can help us understand the factors that contribute to a rise in depression risk, and inform future efforts to prevent it, saidHuda Akil, Ph.D., senior author of the new paper and former co-director of the institute. Understanding enough to predict is a key initial step to prevention, early detection and early treatment of depression.
Lead authorCortney Turner, Ph.D.,an associate research scientist at MNI, says The possibility of preventing depression is what Im most excited about, because the variables at baseline that appear to play the largest role in Affect Score may be modified with training. That might include summer programs before the start of freshman year to help students feel more confident and positive as they arrive on campus.
Harnessing massive data
The team developed the Affect Score with the help of a machine learning tool that was used to comb through all the students responses on thousands of standardized questionnaires and Fitbit data on their activity and sleep.
The data in the paper come from students in three cohorts of students, one that completed their freshman year before the pandemic, and two whose freshman experience was impacted by the pandemic.
At the start of their freshman year, all took 14 standard questionnaires and gave in-depth interviews conducted by Virginia Murphy-Weinberg, N.P., a highly experienced research nurse. They provided samples of blood and/or saliva to be analyzed in U-MsAdvanced Genomics Core.
Samples were obtained on a wide range of biological measures pre-pandemic, but this became more limited for the two COVID-19 cohorts. Nevertheless, they contributed monthly salivary samples to measure stress and other hormones. Each student also received a Fitbit to monitor daily activity and sleep patterns.
The team also followed up with them multiple times with some of the same questionnaires during the rest of their freshman year and into the summer or next academic year to assess symptoms of depression and/or anxiety in each student.
By looking at which genetic variations each student carried on hundreds of thousands of genes, the researchers calculated their individual depression genetic risk score, called an MDD-PRS.
Men and women with a high MDD-PRS score were more likely than their classmates to develop depression as freshmen in the pre-pandemic era. But when the pandemic hit, genetics became less important.
Men with lower MDD-PRS scores were still less likely to develop depression during the pandemic, but not women with similarly low scores. Meanwhile, the overall risk for the group of students with high MDD-PRS scores didnt change much from the pre-pandemic classes.
The pandemic increased not only the incidence of depression in females, but how long it lasts, or its chronicity. No matter their genetic profile, women whose freshman year of college started in 2020 had over eight times the risk of chronic depression symptoms that lasted across that first year and into the summer, compared with those who entered college before the year the pandemic hit, the study shows.
The study also identified what is termed psychological resilience in individuals whose genetic profiles might make them seem more prone to depression, but who didnt develop it despite going through all or part of their freshman year during a pandemic.
This suggests that when the stress gets strong enough, genetic resilience alone is not enough to buffer against it, especially in females, said Akil. But by using machine learning to analyze the components of the psychological profiles at baseline, our ability to predict who became depressed was truly remarkable.
She continued, Both the genetic and nongenetic data tell us that nothing is predestined, and there are multiple kinds of resilience. Colleges and universities need to think about strategies for helping young people walk into their freshman year with the positive state of mind and social support that can help them weather stress, no matter what their background.
The team continues to test the Affect Score tool on freshmen who entered in 2021, 2022 and this fall. Theyre also preparing to test a validated psychiatric intervention digital tool that they hope will help with risk.
The students in the study were all from the University of Michigan, which offers mental health care and mental well-being support through itsCounseling and Psychological Servicesand itsUniversity Health Service.
Akil and Turner are members of the U-M Eisenberg Family Depression Center, which offersmultiple programs to support the mental health of college studentsincluding athletes and veterans. For more than 20 years, the center has sponsored a national conference calledDepression on College Campuses; the next conference will occur in March.
The center also offersa free online Depression Toolkitto support those experiencing depression symptoms and those who want to help them.
In addition to Akil, Turner and Murphy-Weinberg, the research team included Huzefa Khalil, Ph.D. and other MNI faculty, staff and trainees.
Funding: The study was funded by the Office of Naval Research of the U.S. Navy (N00014-09-1-0598, N00014-12-1-0366 and N00014-19-1-2149), and by grants from the Hope for Depression Research Foundation and the Pritzker Neuropsychiatric Disorders Research Consortium Fund LLC. The researchers also used resources from the Michigan Institute for Clinical and Health Research (TR002240).
Author: Kara Gavin Source: University of Michigan Contact: Kara Gavin University of Michigan Image: The image is credited to Neuroscience News
Original Research: Closed access. The impact of COVID-19 on a college freshman sample reveals genetic and nongenetic forms of susceptibility and resilience to stress by Huda Akil et al. PNAS
Abstract
The impact of COVID-19 on a college freshman sample reveals genetic and nongenetic forms of susceptibility and resilience to stress
Using a longitudinal approach, we sought to define the interplay between genetic and nongenetic factors in shaping vulnerability or resilience to COVID-19 pandemic stress, as indexed by the emergence of symptoms of depression and/or anxiety.
University of Michigan freshmen were characterized at baseline using multiple psychological instruments. Subjects were genotyped, and a polygenic risk score for depression (MDD-PRS) was calculated. Daily physical activity and sleep were captured. Subjects were sampled at multiple time points throughout the freshman year on clinical rating scales, including GAD-7 and PHQ-9 for anxiety and depression, respectively.
Two cohorts (2019 to 2021) were compared to a pre-COVID-19 cohort to assess the impact of the pandemic. Across cohorts, 26 to 40% of freshmen developed symptoms of anxiety or depression (N = 331). Depression symptoms significantly increased in the pandemic years and became more chronic, especially in females.
Physical activity was reduced, and sleep was increased by the pandemic, and this correlated with the emergence of mood symptoms. While low MDD-PRS predicted lower risk for depression during a typical freshman year, this genetic advantage vanished during the pandemic. Indeed, females with lower genetic risk accounted for the majority of the pandemic-induced rise in depression.
We developed a model that explained approximately half of the variance in follow-up depression scores based on psychological trait and state characteristics at baseline and contributed to resilience in genetically vulnerable subjects.
We discuss the concept of multiple types of resilience, and the interplay between genetic, sex, and psychological factors in shaping the affective response to different types of stressors.
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