Faculty Bibliography

BACKGROUND: Our aim was to determine if a surgeon's behaviors can encourage or discourage trainees from speaking up when they witness a surgical mistake. STUDY DESIGN: A randomized clinical trial in which medical students (n = 55) were randomly assigned to an "encouraged" (n = 28) or "discouraged" (n = 27) group. Participants underwent personality tests to assess decision-making styles, and were then trained on basic tasks ("burn" then "cut") on a laparoscopic surgery simulator. After randomization, students assisted at a simulated laparoscopic salpingectomy. The senior surgeon used either an "encourage" script (eg, "Your opinion is important.") or a "discourage" script (eg, "Do what I say. Save questions for next time."). Otherwise, the surgery was conducted identically. Subsequently, a surgical mistake was made by the senior surgeon when he instructed students to cut without burning. Students were considered to have spoken up if they questioned the instruction and did not cut. Potential personality bias was assessed with two validated personality tests before simulation. Data were processed with Mann-Whitney and Fisher exact tests. RESULTS: The students in the encouraged group were significantly more likely to speak up (23 of 28 [82%] vs 8 of 27 [30%]; p < 0.001). There was no statistically significant difference between the two groups in personality traits, student training level (p = 1.0), or sex (p = 0.53). CONCLUSIONS: A discouraging environment decreases the frequency with which trainees speak up when witnessing a surgical error. The senior surgeon plays an important role in improving intraoperative communication between junior and senior clinicians and can enhance patient safety.

Objective: To examine whether peri-adolescent children demonstrate the significant racial/ethnic differences in body fatness relative to BMI and in the prevalence and relationship of body composition to risk factors for type 2 diabetes (T2DM) as in adults. Design and Methods: We examined family history of obesity and T2DM, anthropometry, insulin sensitivity and secretory capacity, lipids, and cytokines (IL-6, CRP, TNF-alpha, and adiponectin) in a cohort of 994 middle school students (47% male, 53%, female; 12% African American, 14% East Asian, 13% South Asian, 9% Caucasian, 44% Hispanic, and 8% other). Results: Fractional body fat content was significantly greater at any BMI among South Asians. There were racial/ethnic specific differences in lipid profiles, insulin secretory capacity, insulin sensitivity, and inflammatory markers corrected for body fatness that are similar to those seen in adults. Family history of T2DM was associated with lower insulin secretory capacity while family history of obesity was more associated with insulin resistance. Conclusion: Children show some of the same racial/ethnic differences in risk factors for adiposity-related co-morbidities as adults. BMI and waist circumference cutoffs to identify children at-risk for adiposity-related co-morbidities should be adjusted by racial/ethnic group as well as other variables such as birthweight and family history.