Abstract Objective There seems to exist a excessive demand of emergency services at Complexo Hospitalario de Ourense. This study estimates the percentage of in-appropriate emergency admissions identifying related factors. Material and methods Random sample: 550 randomly selected emergency admissions among the total year 2,000 admissions, excluding pediatric and gynecologic-obstetric patients. Variables included in the study: Identity information (requested at entry); emergency attention/admission; length of stay; adequacy/inadequacy of the stay. AEP Protocol applied (Boston University, Distributed by Avedis Donavedian Foundation). Data source: Medical records. Statistical analyses applied: Descriptive analysis and logistic regression. Results The inappropriate percentage of admissions was 7.3% (IC 95%, 5.3-9.9). Day of the week (Monday) have significant positive correlation with higher percentage of inadequate admissions independently of other variables considered in the study. Conclusions The preliminary hypothesis of elevated amount of inadequate emergency admissions driving the excessive demand of emergency services is not validated nor confirmed through the results of the study. Further factors and variables should be analyzed.