Provider Experience and the Comparative Safety of Laparoscopic and Open Colectomy.
OBJECTIVE
To evaluate the comparative safety of laparoscopic and open colectomy across surgeons varying in experience with laparoscopy.


DATA SOURCES
National Medicare data (2008-2010) for beneficiaries undergoing laparoscopic or open colectomy.


STUDY DESIGN
Using instrumental variable methods to address selection bias, we evaluated outcomes of laparoscopic and open colectomy. Our instrument was the regional use of laparoscopy in the year prior to a patient's operation. We then evaluated outcomes stratified by surgeons' annual volume of laparoscopic colectomy.


PRINCIPAL FINDINGS
Laparoscopic colectomy was associated with lower mortality (OR: 0.75, 95 percent CI: 0.70-0.78) and fewer complications than open surgery (OR: 0.82, 95 percent CI: 0.79-0.85). Increasing surgeon volume was associated with better outcomes for both procedures, but the relationship was stronger for laparoscopy. The comparative safety depended on surgeon volume. High-volume surgeons had 40 percent lower mortality (OR: 0.60, 95 percent CI: 0.55-0.65) and 30 percent fewer complications (OR: 0.70, 95 percent CI: 0.67-0.74) with laparoscopy. Conversely, low-volume surgeons had 7 percent higher mortality (OR: 1.07, 95 percent CI: 1.02-1.13) and 18 percent more complications (OR: 1.18, 95 percent CI: 1.12-1.24) with laparoscopy.


CONCLUSIONS
This population-based study demonstrates that the comparative safety of laparoscopic and open colectomy is influenced by surgeon volume. Laparoscopic colectomy is only safer for patients whose surgeons have sufficient experience.
['Sheetz|Kyle H|KH|', 'Norton|Edward C|EC|', 'Birkmeyer|John D|JD|', 'Dimick|Justin B|JB|']
D000368:Aged D000369:Aged, 80 and over D003082:Colectomy D005260:Female D006801:Humans D010535:Laparoscopy D008297:Male D011183:Postoperative Complications D066231:Surgeons D014481:United States
Comparative safety colectomy instrumental variables