(HealthDay)—Direct supervision in which attending physicians join work rounds does not reduce the rate of medical errors, according to a study published online June 4 in JAMA Internal Medicine.

Kathleen M. Finn, M.D., from Massachusetts General Hospital in Boston, and colleagues conducted a nine-month randomized trial performed in an inpatient general medical service of a large academic medical center. Using a crossover design, 22 faculty provided increased direct , in which attending physicians joined work rounds on previously admitted , or standard supervision, in which attending physicians were available but did not join work rounds. The analysis included 1,259 patients, with 5,772 patient-days.

The researchers observed no in the medical error rate between standard and increased supervision (107.6 versus 91.1 per 1,000 patient-days; P = 0.21). The mean length of time spent discussing established patients in the two models did not differ significantly in time-motion analysis of 161 work rounds (202 versus 202 minutes; P = 0.99). When an attending physician joined rounds, interns spoke less (64 versus 55 minutes; P = 0.008). When an attending was present, interns reported feeling less efficient (P = 0.02) and less autonomous (P = 0.001), while residents reported feeling less autonomous (P < 0.001); when they participated on work rounds, attending physicians rated the quality of care as higher (P = 0.04).

"In designing morning work rounds, residency programs should reconsider their balance of patient safety, learning needs, and resident autonomy," the authors write.