Background: Peak expiratory flow rate (PEFR) is a simple and reliable indicator of pulmonary function influenced by anthropometric and lifestyle factors. University students may differ in daily activity patterns and stress levels depending on their academic stream, which could affect respiratory performance. The present study aimed to compare PEFR between medical and non-medical undergraduate students. Material and Methods: A cross-sectional analytical study was conducted among 220 healthy undergraduate students aged 18–25 years, comprising 110 medical and 110 non-medical students. Participants with a history of chronic respiratory illness, smoking, or acute respiratory infection were excluded. Anthropometric parameters including age, height, weight, and body mass index (BMI) were recorded. PEFR was measured using a standardized peak flow meter, and the highest value of three attempts was documented. Data were analyzed using independent samples t-test and Pearson’s correlation coefficient. A p-value <0.05 was considered statistically significant. Results: The two groups were comparable with respect to age, height, weight, BMI, and gender distribution (p >0.05). Mean PEFR among medical students was 418.7 ± 76.2 L/min, whereas non-medical students demonstrated a significantly higher mean value of 447.9 ± 79.4 L/min (mean difference −29.2 L/min; p = 0.008). Correlation analysis of the overall sample (n = 220) revealed significant positive associations of PEFR with height (r = 0.489, p <0.001), weight (r = 0.352, p <0.001), and BMI (r = 0.198, p = 0.004), while no significant correlation was observed with age (p = 0.118). Conclusion: Non-medical students exhibited significantly higher PEFR compared to medical students despite similar anthropometric profiles. PEFR was positively associated with height, weight, and BMI. Lifestyle and academic-related factors may contribute to these differences and warrant further investigation.

Peak expiratory flow rate; Pulmonary function; Medical students; Non-medical students; Anthropometry