Is Psychiatric Illness Associated With Risk for Postoperative Complications in the Outpatient Setting?

Purpose: Little is known about the association between psychiatric illness and the risk for postoperative complications following outpatient oral and maxillofacial surgery treatment. The purpose of this study was to examine the significance of the presence of psychiatric illness on postoperative complications.

Materials/methods: This was a retrospective cohort study conducted in 2018 that identified patients by searching through the University of Cincinnati's electronic health records. The predictor variable in this study is the presence of psychiatric illness and the outcome variable is the presence or absence of postoperative complications. Additional covariates such as age, race, location, procedure type, and anesthesia type were also included. Results of appropriate descriptive statistics and multivariate logistic regression were presented. Statistical significance was set at P value < .05.

Results: The total number of patients who underwent procedures involving local anesthetic and intravenous sedition in clinic in 2018 were 3,874, of which 1,588 were males (40.99%) and 2,286 were females (59.01%) with a mean age of 36.14 and 35.08 years, respectively. The sample consisted of White (45.87%), Black (35.34%), Hispanic/Latino (2.27%), Asians (1.60%), other races (3.33%), and 11.59% patients have missing data on race. A psychiatric diagnosis was found in 21.37% patients (n = 828). The percentage of patients with 2 or more psychiatric diagnoses was 5.78% (n = 224). The rate of postoperative was reported as 11.33%. A bivariate logistic regression analysis of postoperative complications as an outcome variable found that postoperative complications were not associated with psychiatric history (Odds ratio = 1.049, 95% confidence interval: 0.825 to 1.333, P value = .695). However, sex (P value = < .0001), surgical procedure (P value = < .0001), and anesthetic technique (P value = < .0001) had statistically significant associations with postoperative complications. Other covariates like race (P value = .5943), American Society of Anesthesiologists score (P value = .2539), location (P value = .5323), and multiple psychiatric diagnoses (P value = .7256) were not found to be significantly associated with postoperative complications.

Conclusion: Although our study did show a higher prevalence of psychiatric illnesses in our patient population, it did not show any statistically significant correlation between psychiatric illness and postoperative complications. In addition, there were no statistically significant differences in postoperative complications between different Diagnostic and Statistical Manual of Mental Disorders classes.