The first part of the questionnaire included questions about students' demographics, and the second part included the Turkish version of the DASS. The reliability coefficients (Cronbach α) of DASS–42 in our study were found to be 92.8, 83.5, and 92.3 for depression, anxiety, and stress, respectively. The presence of either depression, anxiety, or stress was accepted as “emotional disorder.” Statistical analyses were conducted with SPSS Version 15.0 for Windows (SPSS Inc., Chicago, IL, U.S.) and Sigma Stat 3.5. The Kruskal-Wallis analysis of variance and Mann-Whitney U test were used to compare the differences in DASS scores among various groups. Dunn's test was used for all pairwise multiple-comparison procedures. Spearman's correlation analysis was used to determine the relation between the length of internship and DASS scores. Chi-square analysis was used to determine the differences among categorical variables, and p values <0.05 were considered statistically significant. The mean age of the group was 24.5 (SD: 1.5) years (range: 23–31 years); 55.4% were men; 4.2% were married. Nineteen students reported that they had previously had psychiatric or chronic illness. The overall prevalence of depression, anxiety, and stress among last-year medical students in our study was 58%. Mean scores for depression, anxiety, and stress were found to be 8.3 (8.1), 9.1 (6.6), and 14.2 (8.9), respectively. The distribution of last-year students regarding depression, anxiety, and stress symptoms of mild severity-or-above were 29.5%, 50.3%, and 39.9%, respectively. These percentages and mean scores were similar to the results of other studies, which were conducted on students, but scores were higher than the studies conducted on the general population and physicians (10–14).