Abstract
While prior studies have demonstrated that insulin-dependence is an independent risk
factor for postoperative complications, morbidity, and mortality following spine and
shoulder, hip, and knee arthroplasty, it has not been evaluated in the setting of
knee arthroscopy. Therefore, the purpose of this study is to compare the risk of postoperative
complications among patients with insulin-dependent diabetes mellitus and noninsulin-dependent
diabetes mellitus (IDDM and NIDDM respectively) with the general population following
knee arthroscopy. A retrospective analysis of the National Surgical Quality Improvement
Program's database for the years 2005 to 2016 was conducted. Logistic regression analyses
were used to assess the relationship between diabetic status and outcomes. Multivariate
models were established to adjust for age, sex, body mass index, hypertension, congestive
heart failure, chronic obstructive pulmonary disease, smoking status, American Society
of Anesthesiology classification, and functional status. A total of 86,023 patients
were identified. Patients with IDDM were at a much higher risk of surgical complications
(odds ratio [OR]: 2.186, 95% confidence interval [CI]: 1.226–1.157), including deep
infections (OR: 3.082, 95% CI: 1.753–5.419) and return to operating room [OR] (OR:
1.933, 95% CI: 1.280–2.919), as well as unplanned hospital admission (OR: 1.770, 95%
CI: 1.289–2.431). However, NIDDM was not an independent risk factor for subsequent
medical or surgical complications, unplanned hospital admission, or 30-day mortality.
Patients with IDDM were much more likely to have surgical complications, including
deep infection and return to OR, as well as unplanned hospital admission following
knee arthroscopy. These risks diminished among those with NIDDM, with their adjusted
risk profiles comparable to those without diabetes. Since diabetes occurs in a heterogenous
state, more weight should be given to those with insulin-dependence when risk-stratifying
patients for surgery. This is a Level III, retrospective comparison study.
Keywords
knee arthroscopy - diabetes - complications - admission - outcomes