The Association Between Borderline Personality Disorder Symptoms and Social Behaviour Among University Students

<i>Background and Objectives:</i> Borderline personality disorder (BPD) is a complex psychiatric condition characterized by emotional instability, impulsivity, a fluctuating self-image, and persistent difficulties in maintaining close interpersonal relationships. Among university students, these traits may be associated with social adjustment and academic functioning difficulties. The present study aimed to examine the prevalence of borderline traits within a Romanian student population and to investigate the associations between these traits and interpersonal difficulties encountered in family life, romantic relationships, and academic environments. <i>Materials and Methods:</i> This cross-sectional study included a total of 151 undergraduate students enrolled in higher education institutions across Romania. Data were gathered through an online questionnaire available between March and May 2025. The instrument comprised items addressing socio-demographic characteristics, diagnostic criteria for borderline personality traits according to the DSM, as well as self-reported social behaviour patterns. Statistical analysis was performed using GraphPad Prism 9, version 9.3.1 for Windows, employing Fisher's exact test and the odds ratio (OR), with a significance threshold set at <i>p</i> < 0.05. <i>Results:</i> Most participants reported experiencing affective instability (71.5%) and distorted self-image (58.9%). Fear of abandonment was present in 29.4% of the respondents, while impulsivity was identified in 37.7%. Borderline personality traits were significantly associated with a range of social difficulties, including relational anxiety, outbursts of anger, peer conflicts, social withdrawal, and dissociative symptoms. Individuals who exhibited impulsivity, self-injurious behaviours, or dissociative episodes demonstrated a markedly increased risk of social dysfunction, with odds ratios ranging from 3 to 10 (<i>p</i> < 0.0001). <i>Conclusions:</i> The findings reveal a high prevalence of borderline traits within the analysed sample, along with statistically significant associations with social and emotional difficulties. These results underscore the importance of implementing psychological screening programs in universities, as well as early intervention strategies focused on the mental well-being of young adults. Establishing a supportive academic environment and fostering collaboration between faculty members and mental health professionals may play a key role in preventing symptom escalation and in promoting healthy personal and relational development.