title: Relation of surgical volume to outcome in eight common operations: results from the VA National Surgical Quality Improvement Program.
abstract: OBJECTIVE
  To examine, in the Veterans Health Administration (VHA), the relation between surgical volume and outcome in eight commonly performed operations of intermediate complexity.
  
  
  BACKGROUND
  In multihospital health care systems such as VHA, consideration is often given to closing low-volume surgical services, with the assumption that better surgical outcomes are achieved in hospitals with larger surgical volumes. Literature data to support this assumption in intermediate-complexity operations are either limited or controversial.
  
  
  METHODS
  The VHA National Surgical Quality Improvement Program data on nonruptured abdominal aortic aneurysmectomy, vascular infrainguinal reconstruction, carotid endarterectomy (CEA), lung lobectomy/pneumonectomy, open and laparoscopic cholecystectomy, partial colectomy, and total hip arthroplasty were used. Pearson correlation, analysis of variance, mixed effects hierarchical logistic regression, and automatic interaction detection analysis were used to assess the association of annual procedure/specialty volume with risk-adjusted 30-day death (and stroke in CEA).
  
  
  RESULTS
  Eight major surgical procedures (68,631 operations) were analyzed. No statistically significant associations between procedure or specialty volume and 30-day mortality rate (or 30-day stroke rate in CEA) were found.
  
  
  CONCLUSIONS
  In VHA hospitals, the procedure and surgical specialty volume in eight prevalent operations of intermediate complexity are not associated with risk-adjusted 30-day mortality rate from these operations, or with the risk-adjusted 30-day stroke rate from CEA. Volume of surgery in these operations should not be used as a surrogate for quality of surgical care.
authors.affiliation: Brockton/West Roxbury VA Medical Center, MA 02132, USA.
authors.forename: S F
authors.initials: SF
authors.lastname: Khuri
authors.forename: J
authors.initials: J
authors.lastname: Daley
authors.forename: W
authors.initials: W
authors.lastname: Henderson
authors.forename: K
authors.initials: K
authors.lastname: Hur
authors.forename: M
authors.initials: M
authors.lastname: Hossain
authors.forename: D
authors.initials: D
authors.lastname: Soybel
authors.forename: K W
authors.initials: KW
authors.lastname: Kizer
authors.forename: J B
authors.initials: JB
authors.lastname: Aust
authors.forename: R H
authors.initials: RH
authors.lastname: Bell
authors.forename: V
authors.initials: V
authors.lastname: Chong
authors.forename: J
authors.initials: J
authors.lastname: Demakis
authors.forename: P J
authors.initials: PJ
authors.lastname: Fabri
authors.forename: J O
authors.initials: JO
authors.lastname: Gibbs
authors.forename: F
authors.initials: F
authors.lastname: Grover
authors.forename: K
authors.initials: K
authors.lastname: Hammermeister
authors.forename: G
authors.initials: G
authors.lastname: McDonald
authors.forename: E
authors.initials: E
authors.lastname: Passaro
authors.forename: L
authors.initials: L
authors.lastname: Phillips
authors.forename: F
authors.initials: F
authors.lastname: Scamman
authors.forename: J
authors.initials: J
authors.lastname: Spencer
authors.forename: J F
authors.initials: JF
authors.lastname: Stremple
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006787:Hospitals, Veterans / Q000592:standards* / Q000706:statistics & numerical data; D006801:Humans; D008297:Male; D008875:Middle Aged; D015233:Models, Statistical; D009096:Multi-Institutional Systems / Q000592:standards / Q000706:statistics & numerical data; D015397:Program Evaluation; D013503:Surgery Department, Hospital / Q000592:standards / Q000706:statistics & numerical data; D013514:Surgical Procedures, Operative / Q000592:standards* / Q000706:statistics & numerical data*; D017749:Total Quality Management; D016896:Treatment Outcome; D014481:United States; D014493:United States Department of Veterans Affairs