Higher education students tend to experience elevated levels of stress^{(Reference Du, Zan and Cho1)}, which are strongly associated with poor academic performance^{(Reference Reuter, Forster and Brister2)}. Academic impairment increases the likelihood of college dropout, therefore, a prominent issue for higher education institutes to consider^{(Reference Turner and McCarthy3)}. In other countries, having healthier patterns of diet and lifestyle behaviours are associated with lower levels of stress in students^{(Reference Hanawi, Saat and Zulkafly4)}. The aim of this study was to assess the current perceived stress levels and their relationship with diet and lifestyle behaviours in a sample of Irish higher education students.

Full-time students, aged 18 and over, were eligible to participate in this cross-sectional web-based survey, hosted by Qualtrics®XM. Recruitment was conducted in the 2020–2021 academic year, during varying stages of the COVID-19 pandemic in three Irish institutes. Self-reported information was collected in relation to demographics, BMI, smoking and the impact of COVID-19. Stress levels of students were measured using the validated Perceived Stress Scale-10 - (PSS-10), which was completed along with validated measures assessing dietary quality (short-form food frequency questionnaire), alcohol use (Alcohol Use Disorders Identification Test Alcohol Consumption - AUDIT- C), sleep quality (Pittsburgh Sleep Quality Index - PSQI), and physical activity (International Physical Activity Questionnaire Short Form - IPAQ-SF). Statistical analysis was performed using Pearson's product-moment correlation and a one-way ANOVA test. Significance was set at p < 0.05.

A total of 682, mainly female (n = 455, 66.8%) students completed the survey cohort, with a mean age of 24.97 ± 8.90 years. Mean PSS-10 scores were 16.78 ± 5.37 with over two-thirds (n = 500, 73.3%) of students deemed moderately or highly stressed. Most students (n = 411, 62.1%) expressed that they were more stressed than usual due to the COVID-19 pandemic with few (n = 57, 8.6%) reporting feeling less stressed. There was a statistically significant, small correlation found between PSS-10 scores and PSQI scores (sleep quality) (r(672) = 0.195, p < 0.001), and a negative correlation between PSS-10 scores and diet quality (r(682) = −0.104, p = 0.006), fruit and vegetable (F&V) consumption (r(676) = −0.158, p < 0.001), and physical activity scores (r(665) = −0.160, p < 0.001). There was no statistically significant correlation between PSS-10 scores and smoking status (p = 0.924), AUDIT-C scores (p = 0.221) or BMI (p = 0.569).

There is evidence of a correlation between having higher levels of stress and a lower quality diet, lower F&V consumption, being less physically active, and having poor sleep quality. BMI, alcohol consumption, and being a smoker were not associated with the stress levels of students. Additional research and clarity of the relationship between stress levels and the diet and lifestyle behaviours of students are warranted in this population group to inform the development of initiatives and programmes to reduce the stress levels of students and potentially decrease the likelihood of college dropout^{(Reference Hanawi, Saat and Zulkafly4)}.