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Volume-Outcome Associations for Parathyroid Surgery in England: Analysis of an Administrative Data Set for the
William K Gray1, Annakan V Navaratnam1,2, Jamie Day1
1Getting It Right First Time program, National Health Service England and National Health Service Improvement, London, United Kingdom.
Importance:
Previous studies have suggested an association between surgical volume and patient outcomes for parathyroid surgery. However, most previous studies are relatively small and the literature is dominated by studies form the US, which might not be readily generalizable to other settings.
Objective:
To investigate volume-outcome associations for parathyroid surgery in England.
Design, Setting, And Participants:
Cohort study that included all National Health Service hospital trusts in England with secondary analysis of administrative data using International Statistical Classification of Diseases and Related Health Problems, Tenth Revision (ICD-10). Participants included all adult, elective hospital admissions for parathyroid surgery without a diagnosis of multiple endocrine neoplasia, parathyroid cancer, or kidney disease over a 5-year period (April 2014-March 2019 inclusive).
Exposures:
The number of procedures conducted in the year prior to the index procedure by each surgeon and each hospital trust.
Main Outcomes And Measures:
Repeat parathyroid surgery within 1 year of the index procedure.
Results:
This study included data for 17 494 participants who underwent parathyroidectomies conducted across 125 hospital trusts. The median (IQR) age of patients was 62 (53-71) years, and 13 826 were female (79.0%). Across the period, the number of surgeons conducting parathyroid surgery changed little (280 in 2014-2015 and 2018-2019), although the number of procedures conducted rose from 3331 to 3848 per annum. Repeat parathyroid surgery at 1 year was significantly associated with surgeon volume (odds ratio [OR], 0.99; 95% CI, 0.98-0.99), but not trust volume, in the previous 12 months. Extended length of stay (OR, 0.98; 95% CI, 0.98-0.99), hypoparathyroidism/calcium disorder (OR, 1.0; 95% CI, 0.99-1.0), and postprocedural complications (OR, 0.99; 95% CI, 0.99-1.0) were also associated with lower surgeon volume.
Conclusions And Relevance:
In this cohort study, higher surgeon annual volume was associated with decreased rates of repeat parathyroid surgery. A minimum volume threshold of 20 procedures per annum should improve patient outcomes, although possible negative effects on access to services should be monitored.
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