BACKGROUND: The Obesity Surgery Mortality Risk Score (OS- @entity7748 ) was developed using data from 1995 to 2004; it has yet to be validated for more recent @entity1 in integrated delivery system settings. The objective of this study was to validate the OS- @entity7748 using data from electronic health records in a distributed data network. METHODS: We conducted a retrospective cohort study of 3,817 adults who underwent an open (21.4%) or laparoscopic (78.6%) gastric bypass surgery between 2005 and 2007 in the Scalable Partnering Network. Our main outcome was all-cause mortality during the 90 days after surgery. We scored @entity1 ' risk of mortality by adding characteristics according to the OS- @entity7748 (i.e., 1 point for each predictor). RESULTS: Sixteen of 3,817 (0.42/100; 95% CI, .24-.68) @entity1 died within 90 days. The OS- @entity7748 discriminated low-risk and high-risk @entity1 effectively: low-risk (2 of 1,654 @entity1 ; .12 @entity204 /100 @entity1 ), intermediate-risk (10 of 2,008 @entity1 ; .50 @entity204 /100 @entity1 ), and high-risk (4 of 155 @entity1 ; 2.58 @entity204 /100 @entity1 ). High-risk @entity1 were 21.3 times more likely to die in the first 90 days after surgery than low-risk @entity1 (risk ratio = 21.3; 95% CI, 3.9-115.6). CONCLUSION: In these 10 U.S. healthcare delivery systems, the OS- @entity7748 appears valid-albeit with the caveat that we observed a small number of @entity204 . The OS- @entity7748 appears useful for identifying the small fraction of @entity1 at high risk for 90-day mortality after open and laparoscopic RYGB.

Predicting 90-day mortality after bariatric surgery: an independent, external validation of the OS- XXXX prognostic risk score.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity204 :: ('MESH:D003643', 'Disease') :: ['deaths'] @entity7748 :: ('MESH:D008556', 'Disease') :: ['MRS']
@entity7748 :: (MESH:D008556,Disease) :: ['MRS']
