What university campus sewage can reveal about the effects of exam stress
It is not often that scientists take a keen interest in the sewage produced by students. But a study of wastewater from a university campus in Australia is revealing insights into how exam stress affects the body that traditional surveys may miss.
Scientists from the University of Queensland have discovered intriguing insights about the impact of exam stress on students' health through the analysis of sewage from university campuses. Led by Qiuda Zheng, the researchers collected daily wastewater samples before and during exams in late 2022 from a campus housing approximately 30,000 individuals.
Their investigation focused on markers of oxidative stress, which can result from psychological stressors and other factors such as smoking and illness. They also sought to identify potential responses to stress, including traces of antidepressants, ADHD medications, alcohol, nicotine, caffeine, and artificial sweeteners.
The study, published in the journal Nature Water, revealed that levels of one oxidative stress marker, 8-OHG, significantly increased during the exam period compared to a nearby community of around 120,000 people. This finding suggests that the pressure of exams may have had a measurable effect on the students' bodies. However, the researchers acknowledged that oxidative stress can stem from various causes and should be considered as indirect indicators of stress rather than definitive measures of psychological condition.
Levels of another oxidative stress marker, 8-OHdG, also rose, though the increase was not statistically significant compared to the general population.
Furthermore, the researchers noted signs of increased antidepressant use during exams, though the evidence was inconclusive. Interestingly, there was no significant rise in nicotine consumption, while a marker of caffeine consumption appeared to decrease relative to the comparison population. While further research is necessary, the study's authors believe that wastewater analysis could serve as a valuable new method for monitoring stress in addition to traditional surveys and medical records.
They view wastewater surveillance as a potential tool to observe dynamic stress-related responses in university populations.
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