Figure 4.

Linear regression results of the independent categorical variables including the dichotomous antidepressant variable where the points represent the slope coefficient with the 95% confidence interval (CI) for the dependent pain VAS variable. Pain VAS values can range from 0 to 100. Any variable without a CI was the reference variable and any CI that did not include 0 represents a significant influence on the pain VAS. Preoperative EQ VAS and pain VAS scores and age were the influential continuous variables on postoperative pain VAS scores as indicated in Table 3.